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]