donkey
Word family noundonkey jacketdonkey
Animals
don·key /ˈdɒŋki $ ˈdɑːŋki/ ●○○ noun 1. 
HBA[countableC] a grey or brown animal like a horse, but smaller and with long ears 驴
HBA[countableC] a grey or brown animal like a horse, but smaller and with long ears 驴2 donkey’s years LONG TIME British EnglishBrE spoken a very long time 很久，多年
for donkey’s years
I’ve had this jacket for donkey’s years.
这件夹克衫我穿了好多年了。
Examples from the Corpus
donkey’s years• She worked in the shop for donkey's years, although the pay was awful.• It's donkey's years since I went to the movies.• We used to play golf together, but that was donkey's years ago.
Examples from the Corpus
donkey• The students dissected donkeys rather than horses and even Coleman used donkey material to demonstrate horse muscles.• Shelter is essential - especially for donkeys.• When he made his rounds on a light-gray donkey, people bowed their heads and dared not look at his face.• Police in Ballymoney, Co Antrim, yesterday confirmed the donkey was stolen.• The donkey decided to go to Bremen, a town where everyone played music.• The rugged terrain is inhabited by deer, antelopes and, locals say, wild donkeys.
(1700-1800) Perhaps from dun (=gray-brown) + -key (as in monkey)