Words related to bass

base (adj.)
late 14c., "low, of little height," from Old French bas "low, lowly, mean," from Late Latin bassus "thick, stumpy, low" (used only as a cognomen in classical Latin, humilis being there the usual word for "low in stature or position"), possibly from Oscan, or Celtic, or related to Greek basson, comparative of bathys "deep."

Meaning "low on the social scale" is from late 15c.; that of "low in the moral scale" is first attested 1530s in English. Meaning "benefiting an inferior person or thing, unworthy" is from 1590s. Base metals (c. 1600) were worthless in contrast to noble or precious metals. Related: Basely.
bristle (n.)
"stiff, coarse hair of certain animals," especially those set along the backs of hogs, Old English byrst "bristle," with metathesis of -r-, from Proto-Germanic *bursti- (source also of Middle Dutch borstel, German borste, Danish börste), from PIE *bhrsti- from root *bhars- "point, bristle" (source also of Sanskrit bhrstih "point, spike"). With -el, diminutive suffix. Extended to similar appendages on some plants and insects.
ass (n.2)
Origin and meaning of ass

slang for "backside," first attested 1860 in nautical slang, in popular use from 1930; chiefly U.S.; from dialectal variant pronunciation of arse (q.v.). The loss of -r- before -s- is attested in other words (burst/bust, curse/cuss, horse/hoss, barse/bass, garsh/gash, parcel/passel).

Indirect evidence of the change from arse to ass can be traced to 17c. By 1680s arse was being pronounced to rhyme with "-ass" words, as in "Sodom or the Quintessence of Debauchery": "I would advise you, sir, to make a pass/Once more at Pockenello's loyal arse." It is perhaps as early as Shakespeare's day, if Nick Bottom transformed into a donkey in "A Midsummer Night's Dream" (1594) is the word-play some think it is.

I must to the barber's, mounsieur; for me thinks I am marvellous hairy about the face; and I am such a tender ass, if my hair do but tickle me, I must scratch. [Bottom]

By 1785 polite speakers were avoiding ass in the "donkey" sense. 

Meaning "woman regarded as a sexual object" is by early 1940s (piece of ass seems to be implied in 1930s Tijuana Bibles), but the image is older (compare buttock "a common strumpet," 1670s). To have (one's) head up (one's) ass "not know what one is doing" is attested by 1969. Colloquial (one's) ass "one's self, one's person" attested by 1958. To work (one's) ass off "work very much" is by 1946; to laugh (one's) ass off "laugh very much" is by 1972 (implied from 1965). The (stick it) up your ass oath is attested by 1953; apparent euphemisms suggest earlier use:

He snoighed up his nose as if th' cheese stunk, eyed me wi an air o contempt fro my shoon to my yed, un deawn ogen fro my yed to my shoon ; un then pushin th' brade un cheese into my hont ogen, he says "Take your vile bread and cheese and stick it up your coat sleeve, and be demmed to you. Do you think I want your paltry grub?" Un then, turnin on his heel, he hurried into th' perk. ["Bobby Shuttle un His Woife Sayroh's Visit to Manchester," 1857] 
bas-relief (n.)
1660s, from French bas-relief, a loan-translation of Italian basso-rilievo "low relief, raised work." See bass (adj.) + relief.
bassoon (n.)
"large, double-reeded woodwind bass instrument," 1727, from French basson (17c.), from Italian bassone, augmentative of basso (see bass (adj.)). Compare balloon (n.); also see -oon. Related: Bassoonist. The Italian name, fagotto, literally "bundle of sticks" (see faggot (n.2)) is because it comes apart in two or more parts for convenience in carrying.
bassist (n.)

"one who plays a bass instrument," 1909, "person who plays the double-bass" (earlier in German), from bass (n.2) + -ist. By 1958 as "person who plays the bass electric guitar."

double-bass (n.)

string instrument, the largest and deepest instrument of the viol family, by 1728; see double (adj.) + bass (n.2).

dace (n.)

type of small European freshwater fish, mid-15c., also dars, dase, dare, from Old French darz"a dace," nominative or plural of dart "dart" (see dart (n.)). So called for its swiftness. Another theory traces it to a Medieval Latin darsus "a dart," which is said to be of Gaulish origin. Also used of similar or related fish. For loss of -r- before -s-, compare bass (n.1) from barse and see ass (n.2).