bathroom (n.) Look up bathroom at Dictionary.com
1780, from bath + room (n.). Originally a room with apparatus for bathing, used 20c. in U.S. as a euphemism for a lavatory and often noted as a word that confused British travelers. To go to the bathroom, euphemism for "relieve oneself; urinate, defecate," from 1920 (in a book for children), but typically used without regard for whether an actual bathroom is involved.
Bathsheba Look up Bathsheba at Dictionary.com
Biblical wife of King David, mother of Solomon, from Hebrew Bathshebha, literally "daughter of the oath," from bath "daughter."
bathtub (n.) Look up bathtub at Dictionary.com
1837, from bath + tub. Prohibition-era bathtub gin is recorded by 1928.
bathukolpian (adj.) Look up bathukolpian at Dictionary.com
"big-breasted," 1825, from Greek bathykolpos, literally "deep-bosomed," from bathys "deep" (see benthos) + kolpos "breast" (see gulf (n.)).
bathyscaphe (n.) Look up bathyscaphe at Dictionary.com
"diving apparatus for reaching great depths," 1947, name coined by its inventor, Swiss "scientific extremist" Prof. Auguste Piccard (1884-1962), from Greek bathys "deep" (see benthos) + skaphe "light boat, skiff" (see skaphoid).
batik (n.) Look up batik at Dictionary.com
1880, from Dutch, from Malay (Austronesian) mbatik, said to be from amba "to write" + titik "dot, point."
batman (n.) Look up batman at Dictionary.com
"officer's servant," originally military title for "man in charge of a bat-horse and its load," 1755, from bat "pack-saddle" (late 14c.), from Old French bast (Modern French bât), from Late Latin bastum (see baton). Hence also batwoman (1941). The comic book hero dates from 1939.
baton (n.) Look up baton at Dictionary.com
1540s, "a staff used as a weapon," from French bâton "stick, walking stick, staff, club, wand," from Old French baston (12c.) "stick, staff, rod," from Late Latin bastum "stout staff," probably of Gaulish origin or else from Greek *baston "support," from bastazein "to lift up, raise, carry." Meaning "staff carried as a symbol of office" is from 1580s; musical sense of "conductor's wand" is from 1841 (from 1839 as a French word in English). Often Englished 17c.-18c. as batoon.
Baton Rouge Look up Baton Rouge at Dictionary.com
city in Louisiana, U.S., a French translation of Choctaw itti homma "red pole," perhaps in reference to a painted boundary marker.
battalion (n.) Look up battalion at Dictionary.com
1580s, from Middle French bataillon (16c.), from Italian battaglione "battle squadron," from diminutive of Vulgar Latin battalia "battle," from Latin bauttere "to beat" (see batter (v.)). Specific sense of "part of a regiment" is from 1708.
Madame, lui répondit-il, ne vous y fiez pas: j'ay tôujours vû Dieu do coté des gros Batallions. [E.Boursault, 1702]
batten (n.) Look up batten at Dictionary.com
"strip of wood (especially used to fasten canvas over ships' hatches)," 1650s, Englished variant of baton "a stick, a staff" (see baton). Nautical use attested from 1769.
batten (v.1) Look up batten at Dictionary.com
"to improve; to fatten," 1590s, probably representing an English dialectal survival of Old Norse batna "improve" (source also of Old English batian, Old Frisian batia, Old High German bazen, Gothic gabatnan "to become better, avail, benefit," Old English bet "better;" also see boot (v.)). Related: Battened; battening.
batten (v.2) Look up batten at Dictionary.com
"to furnish with battens," 1775, from batten (n.); phrase batten down recorded from 1823. Related: Battened; battening.
Battenberg (n.) Look up Battenberg at Dictionary.com
type of cake, 1903, from name of a town in Germany, the seat of a family which became known in Britain as Mountbatten.
batter (v.) Look up batter at Dictionary.com
"strike repeatedly, beat violently and rapidly," early 14c., from Old French batre "to beat, strike" (11c., Modern French battre "to beat, to strike"), from Latin battuere "to beat, strike," an old word in Latin, but almost certainly borrowed from Gaulish, from PIE root *bhau- "to strike" (source also of Welsh bathu "beat;" Old English beadu "battle," beatan "to beat," bytl "hammer, mallet"). Began to be widely used 1962 in reference to domestic abuse. Related: Battered; battering. Battering-ram is an ancient weapon (Latin aries), but the word attested only from 1610s.
batter (n.) Look up batter at Dictionary.com
"flour, eggs, and milk beaten together," late 14c., from Old French batteure "a beating," from Latin battuere "to beat, knock" (see batter (v.)).
battery (n.) Look up battery at Dictionary.com
1530s, "action of battering," from Middle French batterie, from Old French baterie (12c.) "beating, thrashing, assault," from batre "beat," from Latin battuere "beat" (see batter (v.)).

Meaning shifted in Middle French from "bombardment" ("heavy blows" upon city walls or fortresses) to "unit of artillery" (a sense recorded in English from 1550s). Extension to "electrical cell" (1748, first used by Ben Franklin) is perhaps from the artillery sense via notion of "discharges" of electricity. In Middle English, bateri meant only "forged metal ware." In obsolete baseball jargon battery was the word for "pitcher and catcher" considered as a unit (1867, originally only the pitcher).
batting (n.) Look up batting at Dictionary.com
"sheets of cotton fiber," 1875, variant of obsolete bat "felted mass of fur, wool, etc.," from bat (n.1), on notion of "beaten" fabric.
battle (n.) Look up battle at Dictionary.com
c. 1300, from Old French bataille "battle, single combat," also "inner turmoil, harsh circumstances; army, body of soldiers," from Late Latin battualia "exercise of soldiers and gladiators in fighting and fencing," from Latin battuere "to beat, to strike" (see batter (v.)). Phrase battle royal "fight involving several combatants" is from 1670s.
battle (v.) Look up battle at Dictionary.com
early 14c., "to fight," from French batailler (12c.), from bataille (see battle (n.)). Related: Battled; battling.
battle-axe (n.) Look up battle-axe at Dictionary.com
late 14c., weapon of war, from battle (n.) + axe (n.); meaning "formidable woman" is U.S. slang, first recorded 1896.
battledore (n.) Look up battledore at Dictionary.com
mid-15c., "bat-like implement used in washing clothes," of unknown origin, perhaps from Old Provençal batedor, Spanish batidor "beater, bat," from batir "to beat;" perhaps blended with Middle English betel "hammer, mallet." As a trype of racket used in a game, from 1590s.
battlefield (n.) Look up battlefield at Dictionary.com
1812, from battle (n.) + field (n.). The usual word for it in Old English was wælstow, literally "slaughter-place."
battlement (n.) Look up battlement at Dictionary.com
early 14c., from Old French bataillement, earlier bastillement "fortification," from bastillier "to fortify, to equip with battlements," from bastille "fortress, tower" (see bastion). The raised parts are cops or merlons; the indentations are embrasures or crenelles.
battleship (n.) Look up battleship at Dictionary.com
1794, shortened from line-of-battle ship (1705), one large enough to take part in a main attack (formerly one of 74-plus guns); from battle (n.) + ship (n.). Later in U.S. Navy in reference to a class of ships that carried guns of the largest size. The last was decommissioned in 2006. Battleship-gray as a color is attested from 1916. Fighter and bomber airplanes in World War I newspaper articles were sometimes called battleplanes, but it did not catch on.
battology (n.) Look up battology at Dictionary.com
"needless repetition in speaking or writing," c. 1600, from Greek battologia "a speaking stammeringly," from battos "stammerer," of imitative origin, + -logia (see -logy).
batty (adj.) Look up batty at Dictionary.com
1580s, "pertaining to bats," from bat (n.2) + -y (2). Slang sense "nuts, crazy" is attested from 1903, from the expression (to have) bats in (one's) belfry, also meaning "not be right in the head" (1899).
bauble (n.) Look up bauble at Dictionary.com
"showy trinket or ornament," early 14c., from Old French baubel "child's toy, trinket," probably a reduplication of bel, from Latin bellus "pretty" (see bene-). Or else related to babe, baby.
baud (n.) Look up baud at Dictionary.com
1932, originally a unit of speed in telegraphy, coined in French in 1929 in honor of French inventor and engineer Jean-Maurice-Émile Baudot (1845-1903), who designed a telegraph printing system.
Bauhaus (n.) Look up Bauhaus at Dictionary.com
1923, from German Bauhaus, literally "architecture-house;" school of design founded in Weimar, Germany, 1919 by Walter Gropius (1883-1969), later extended to the principles it embodied. First element is bau "building, construction, structure," from Old High German buan "to dwell" (see bound (adj.2)). For second element, see house (n.).
baulk Look up baulk at Dictionary.com
alternative spelling of balk, especially in billiards, in reference to a bad shot.
bauxite (n.) Look up bauxite at Dictionary.com
1861, clayey mineral containing aluminum, from French bauxite (1821), from Les Baux, near Soles, where it was first found. The place name is from Provençal Li Baus, literally "the precipices."
Bavaria Look up Bavaria at Dictionary.com
named for the Boii, ancient Celtic people who once lived there (also see Bohemia).
bawd (n.) Look up bawd at Dictionary.com
a complicated word of uncertain history. First attested late 15c., "lewd person" (of either sex; since c. 1700 applied only to women), probably from baude-strote "procurer of prostitutes" (mid-14c.), which may be from Middle English bawde (adj.) "merry, joyous," from Old French baud "gay, licentious" (from Frankish *bald "bold" or some such Germanic source). It would not be the first time a word meaning "joyous" had taken on a sexual sense. The sense evolution shading from "bold" to "lewd" is not difficult; compare Old French baudise "ardor, joy, elation, act of boldness, presumption;" baudie "elation, high spirits," fole baudie "bawdry, shamelessness." The Old French word also is the source of French baudet "donkey," in Picardy dialect "loose woman."

The second element in baude-strote would be trot "one who runs errands," or Germanic *strutt (see strut). But OED doubts all this. There was an Old French baudestrote, baudetrot of the same meaning (13c.), and this may be the direct source of Middle English baude-strote. The obsolete word bronstrops "procuress," frequently found in Middleton's comedies, probably is an alteration of baude-strote.
bawdry (n.) Look up bawdry at Dictionary.com
"obscenity," late 14c., probably from Old French bauderie "boldness, ardor, elation, pride" (see bawd).
bawdy (adj.) Look up bawdy at Dictionary.com
late 14c., "soiled, dirty, filthy," from bawd + -y (2). Meaning "lewd" is from 1510s, from notion of "pertaining to or befitting a bawd;" usually of language (originally to talk bawdy).
Bawdy Basket, the twenty-third rank of canters, who carry pins, tape, ballads and obscene books to sell. [Grose, "Dictionary of the Vulgar Tongue," 1785]
Related: Bawdily; bawdiness.
bawl (v.) Look up bawl at Dictionary.com
mid-15c., "to howl like a dog," from Old Norse baula "to low like a cow," and/or Medieval Latin baulare "to bark like a dog," both echoic. Meaning "to shout loudly" attested from 1590s. To bawl (someone) out "reprimand loudly" is 1908, American English. Related: Bawled; bawling.
bay (n.1) Look up bay at Dictionary.com
"inlet of the sea," c. 1400, from Old French baie, Late Latin baia (c.640), perhaps ultimately from Iberian bahia.
bay (n.2) Look up bay at Dictionary.com
"opening in a wall," late 14c. (especially bay window, early 15c.), from Old French baee "opening, hole, gulf," noun use of fem. past participle of bayer "to gape, yawn," from Medieval Latin batare "gape," perhaps of imitative origin. It is the bay in sick-bay.
bay (n.3) Look up bay at Dictionary.com
"howl of a dog," early 14c., earlier "howling chorus raised (by hounds) when in contact with the hunted animal," c. 1300, from Old French bayer, from PIE root *bai- echoic of howling (compare Greek bauzein, Latin baubari "to bark," English bow-wow; also see bawl). From the hunting usage comes the transferred sense of "final encounter," and thence, on the notion of putting up an effective defense, at bay.
bay (adj.) Look up bay at Dictionary.com
"reddish-brown," usually of horses, mid-14c., from Anglo-French bai (13c.), Old French bai, from Latin badius "chestnut-brown" (used only of horses), from PIE *badyo- "yellow, brown" (source also of Old Irish buide "yellow"). Also elliptical for a horse of this color.
bay (n.4) Look up bay at Dictionary.com
laurel shrub (Laurus nobilis, source of the bay leaf), late 14c., originally only of the berry, from Old French baie (12c.) "berry, seed," from Latin baca "berry." Extension to the shrub itself is from 1520s. The leaves or sprigs were woven as wreaths for conquerors or poets. Bayberry first recorded 1570s, after the original sense had shifted.
bay (v.) Look up bay at Dictionary.com
"to bark or howl (at)," late 14c., from bay (n.3). Related: Bayed; baying.
Bayard (n.) Look up Bayard at Dictionary.com
generic or mock-heroic name for a horse, mid-14c., from Old French Baiard, name of the bay-colored magic steed given by Charlemagne to Renaud in the legends, from Old French baiart "bay-colored" (see bay (adj.)). Also by early 14c. proverbial as a blind person or thing, for now-unknown reasons. The name later was used attributively of gentlemen of courage and integrity, in this sense from Pierre du Terrail, seigneur de Bayard (1473-1524), French knight celebrated as Chevalier sans peur et sans reproche. The surname is perhaps in reference to hair color.
bayonet (n.) Look up bayonet at Dictionary.com
1610s, originally a type of dagger; as a steel stabbing weapon fitted to the muzzle of a firearm, from 1670s, from French baionnette (16c.), said to be from Bayonne, city in Gascony where supposedly they first were made; or perhaps it is a diminutive of Old French bayon "crossbow bolt." The city name is from Late Latin baia "bay" + Basque on "good." As a verb from c. 1700.
bayou (n.) Look up bayou at Dictionary.com
1766, via Louisiana French, from Choctaw bayuk "small stream."
bazaar (n.) Look up bazaar at Dictionary.com
1580s, from Italian bazarra, ultimately from Persian bazar (Pahlavi vacar) "a market."
bazar (n.) Look up bazar at Dictionary.com
alternative spelling of bazaar.
bazooka (n.) Look up bazooka at Dictionary.com
"metal tube rocket launcher," 1942, from name of a junkyard musical instrument used (c. 1935) as a prop by U.S. comedian Bob Burns (1896-1956); extension of bazoo, slang for "mouth" or "boastful talk" (1877), probably from Dutch bazuin "trumpet."
bazooms (n.) Look up bazooms at Dictionary.com
"woman's breasts," especially when deemed prominent, 1955, American English slang alteration of bosoms.