Etymology
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across (adv./prep.)

c. 1200, o cros, "in the shape of a cross;" c. 1300, a-croiz, "in a crossed position;" early 14c., acros, "from one side to another;" a contraction of Anglo-French an cros, literally "on cross;" see a- (1) + cross (n.)).

Meaning "on the other side (as a result of crossing)" is from 1750. In crossword puzzle clues from 1924. Spelling acrost, representing a dialectal or vulgar pronunciation, is attested by 1759. Phrase across the board "embracing all categories" (1945) is said to be originally from horse-racing, in reference to a bet of the same amount of money on a horse to win, place, or show. To get (something) across "make (something) understood or appreciated" is by 1913, probably from earlier theater expression get (something) across the footlights, perform it so as to be received by the audience (1894).

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cut (n.)

mid-15c., "a certain length" of something; 1520s, "gash, incision, opening made by an edged instrument," from cut (v.).

Meaning "piece cut off" (especially of meat) is from 1590s. Figurative sense of "a wounding sarcasm" is from 1560s. Meaning "an excision or omission of a part" is from c. 1600. Sense of "a reduction" is by 1881. Meaning "manner in which a thing is cut" is from 1570s, hence "fashion, style, make" (1580s).

Dialectal or local sense of "a creek or inlet" is from 1620s. Meaning "channel or trench made by cutting or digging" is from 1730. Meaning "block or stamp on which a picture is engraved" is from 1640s. Sense of "act of cutting a deck of cards" is from 1590s. Cinematic sense of "a quick transition from one shot to the next" is by 1933. Meaning "share" (of profit, loot, etc.) is by 1918.

Meaning "phonograph recording" is by 1949; the verb in the sense "make a recording" is by 1937, from the literal sense in reference to the mechanical process of making sound recordings.

Instead of a cutting tool actually operated by the sound vibrations from the voices or instruments of performing artists, the panatrope records are cut by a tool that is operated electrically. ["The New Electric Phonograph," in Popular Science, February 1926]. 

A cut above "a degree better than" is from 1818. Cold-cuts "cooked meats sliced and served cold" (1945) translates German kalter Aufschnitt.

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cut (adj.)

"formed or fashioned as if by cutting or carving," 1510s, past-participle adjective from cut (v.). Meaning "hewn, chiseled" (of stone, etc.) is from 1670s. Meaning "gashed with a sharp instrument" is from 1660s.

Cut and dried is by 1770 in the figurative sense "routine, boring," a reference to herbs in shops as opposed to growing in the wild.

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cut (v.)

c. 1300, "to make, with an edged tool or instrument, an incision in; make incisions for the purpose of dividing into two or more parts; remove by means of a cutting instrument;" of an implement, "have a cutting edge," according to Middle English Compendium from a presumed Old English *cyttan, "since ME has the normal regional variants of the vowel." Others suggest a possible Scandinavian etymology from North Germanic *kut- (source also of Swedish dialectal kuta "to cut," kuta "knife," Old Norse kuti "knife"), or that it is from Old French couteau "knife."

It has largely displaced Old English ceorfan (see carve (v.)), snian, and scieran (see shear). The past participle is also cut, though cutted sometimes has been used since Middle English.

From early 14c. as "to make or fashion by cutting or carving." From c. 1400 as "to intersect or cross." From early 15c. as "abridge or shorten by omitting a part."

Meaning "to wound the sensibilities of" is from 1580s (to cut the heart in the same sense is attested from early 14c.). Sense of "sever connection or relations with" is from 1630s.

Meaning "to be absent without excuse" is British university slang from 1794. Colloquial or slang sense of "move off with directness and rapidity" is from 1580s. Meaning "divide (a deck of cards) at random into parts before the deal" to prevent cheating is from 1530s.

Meaning "to dilute, adulterate" (liquor, etc.) is by 1930. Colloquial sense of "to divide or share" is by 1928, perhaps an image from meat-carving at table. As a director's call to halt recording or performing, by 1931 (in an article about Pete, the bulldog with the black-ringed eye in the Hal Roach studios shorts, who was said to know the word). The sense of "perform, execute" (c. 1600) is in cut capers "frisk about;" cut a dash "make a display."

To cut down is from late 14c. as "to fell;" by 1821 as "to slay" (as with a sword); 1857 as "to curtail." To cut (someone or something) down to size is from 1821 as "reduce to suitable dimensions;" the figurative sense, "reduce to the proper level of importance," is by 1927.

To cut in "enter suddenly and unceremoniously" is from 1610s; sense of "suddenly join in conversation, interrupt" is by 1830. To cut up "cut in pieces" is from 1570s. To cut back is from 1871 as "prune by cutting off shoots," 1913 in cinematography, "return to a previous scene by repeating a part of it," 1943 as "reduce, decrease" (of expenditures, etc.). To cut (something) short "abridge, curtail, interrupt" is from 1540s.

In nautical use to cut a feather (1620s) is to move so fast as to make water foam under the bow. To cut and run (1704) also is originally nautical, "cut cable and set sail immediately," as in an emergency, hence, generally, "to make off suddenly."

To cut the teeth "have the teeth grow through the gums" as an infant is from 1670s. To cut both ways in the figurative sense of "have a good and bad effect" is from c. 1600. To cut loose "set (something) free" is by 1828; intransitive sense "begin to act freely" is by 1909.

Cut it out "remove (something) by or as if by cutting" yielded a figurative use in the command cut it out! "Stop! That's enough!" by 1933. The evolution seems to have begun earlier. A piece attributed to the Chicago Live Stock World that made the rounds in trade publications 1901-02 begins:

When you get 'hot' about something and vow you are going to rip something or somebody up the back—cut it out.
If you feel disposed to try the plan of building yourself up by tearing some one else down—cut it out.

Playing on both senses, it ends with "Should you, after reading this preachy stuff, fear you might forget some of the good advice—cut it out."

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cut-off (n.)

also cutoff, 1640s, "act of cutting off," also "portion cut off," from verbal phrase cut off (see cut (v.) + off (adv.)). Sense of "new and shorter channel formed on a river" (especially the Mississippi) is from 1773; of road that cut off or shorten a route, from 1806; of clothing (adj.), from 1840. Cutoffs "jeans or other long pants trimmed down to be shorts" is by 1967.

The verbal phrase is attested from late 14c. as "detach by cutting;" from 1570s as "exclude from access" and "bring to an abrupt end;" and from 1590s as "intercept, stop the flow or passage of."

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buzz-cut (n.)
by 1973, American English, from buzz (n.), perhaps from the sound of the barber's electric clipper, + cut (n.) in the "haircut" sense.
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cut-throat (n.)

also cutthroat, "murderer, ruffian, assassin," 1530s, from cut (v.) + throat (n.). As an adjective, "cruel, murderous," from 1560s. Of card games from 1823. For construction, compare daredevil.

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clear-cut (adj.)

"formed with distinct outlines" (as if by cutting as opposed to molding), 1855, from clear (adj.) + past participle adjective from cut (v.).

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cut-and-paste (adj.)

"made or composed by piecing together existing parts," by 1938 with reference to trick photographs; see cut (v.) + paste (v.). By 1959 with reference to doing things with haste, carelessness, or lack of inspiration.

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cross-cut (adj.)

"used for cutting crosswise," 1820, from cross (adv.) + cut (v.). As a verbal phrase, "to cut transversely," from 1590s. An old name for a cross-cut saw was thwart-saw (mid-15c.).

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