hackyoudaoicibaDictYouDict[hack 词源字典]
hack: English has two distinct words hack. By far the older, ‘cut savagely or randomly’ [OE], goes back via Old English haccian to a prehistoric West Germanic *khak-, also reproduced in German hacken and Dutch hakken. It perhaps originated in imitation of the sound of chopping. Hack ‘worn-out horse’ [17] is short for hackney (as in hackney carriage), a word in use since the 14th century in connection with hired horses.

It is thought that this may be an adaptation of the name of Hackney, now an inner-London borough but once a village on the northeastern outskirts of the capital where horses were raised before being taken into the city for sale or hire. Most rented horses being past their best from long and probably ill usage, hackney came to mean ‘broken-down horse’ and hence in general ‘drudge’.

This quickly became respecified to ‘someone who writes for hire, and hence unimaginatively’, which influenced the development of hackneyed ‘trite’ [18]. The modern sense of hacker, ‘someone who gains unauthorized access to computer records’, comes from a slightly earlier ‘one who works like a hack – that is, very hard – at writing and experimenting with software’.

[hack etymology, hack origin, 英语词源]
hack (v.1)youdaoicibaDictYouDict
"to cut roughly, cut with chopping blows," c. 1200, from verb found in stem of Old English tohaccian "hack to pieces," from West Germanic *hakkon (cognates: Old Frisian hackia "to chop or hack," Dutch hakken, Old High German hacchon, German hacken), from PIE *keg- "hook, tooth" (see hook (n.)). Perhaps influenced by Old Norse höggva "to hew, cut, strike, smite" (which is unrelated, from PIE *kau- "to hew, strike;" see hew). Slang sense of "cope with" (as in can't hack it) is first recorded in American English 1955, with a sense of "get through by some effort," as a jungle (phrase hack after "keep working away at" is attested from late 14c.). To hack around "waste time" is U.S. slang, by 1955, perhaps originally of golfers or cabbies. Related: Hacked; hacking.
hack (n.2)youdaoicibaDictYouDict
"person hired to do routine work," c. 1700, ultimately short for hackney "an ordinary horse, horse for general service (especially for driving or riding, as opposed to war, hunting, or hauling)," c. 1300. This word is probably from the place name Hackney, Middlesex. Apparently nags were raised on the pastureland there in early medieval times. Extended sense of "horse for hire" (late 14c.) led naturally to "broken-down nag," and also "prostitute" (1570s) and "a drudge" (1540s), especially a literary one, one who writes according to direction or demand. Sense of "carriage for hire" (1704) led to modern slang for "taxicab." As an adjective, 1734, from the noun. Hack writer is first recorded 1826, though hackney writer is at least 50 years earlier. Hack-work is recorded from 1851.
hack (v.2)youdaoicibaDictYouDict
"illegally enter a computer system," by 1984; apparently a back-formation from hacker. Related: Hacked; hacking (1975 in this sense). Earlier verb senses were "to make commonplace" (1745), "make common by everyday use" (1590s), "use (a horse) for ordinary riding" (1560s), all from hack (n.2).
hack (n.1)youdaoicibaDictYouDict
"tool for chopping," early 14c., from hack (v.1); cognates: Danish hakke "mattock," German Hacke "pickax, hatchet, hoe." Meaning "a cut, notch" is from 1570s. Meaning "an act of cutting" is from 1836; figurative sense of "a try, an attempt" is first attested 1898.
hack (v.3)youdaoicibaDictYouDict
"to cough with a short, dry cough," 1802, perhaps from hack (v.1) on the notion of being done with difficulty, or else imitative.
hack (adj.)youdaoicibaDictYouDict
"hired, mercenary," 1812, from hack (n.2).
hack (n.3)youdaoicibaDictYouDict
"a short, hard cough," 1885, from hack (v.3).