ass

donkey, ass

这两个名词都表示“驴”之意。
donkey: 是普通常用词。
ass: 作此解的用法比较古老。

名词 ass:

1. the fleshy part of the human body that you sit on
   同义词：buttocks, nates, arse, butt, backside, bum, buns, can, fundament, hindquarters, hind end, keister, posterior, prat, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush, bottom, behind, derriere, fanny
2. a pompous fool
3. hardy and sure-footed animal smaller and with longer ears than the horse
4. slang for sexual intercourse
   同义词：fuck, fucking, screw, screwing, nooky, nookie, piece of ass, piece of tail, roll in the hay, shag, shtup

1. You're a pain in the ass.
   你这讨厌鬼。
2. A mule is a cross between a horse and an ass.
   骡是马和驴交配而生的杂种。
3. Mules are a cross between a horse and an ass.
   骡子是马和驴的杂种。
4. What an ass I am!
   我多蠢啊！

ass

n.（名词）
【复数】 ass.es[2s.z]
Any of several hoofed mammals of the genusEquus, resembling and closely related to the horses but having a smaller build and longer ears, and including the domesticated donkey.
驴：一种有蹄哺乳动物马 属，外貌与马相似有亲缘关系，但个子小耳朵长，包括驯养的驴
A vain, self-important, silly, or aggressively stupid person.
愚蠢的人：自负的，妄自尊大的，愚蠢的或过分自信的笨蛋

来源：
Middle English asse
中古英语 asse
from Old English assa
源自 古英语 assa
[perhaps of Celtic origin]
[可能源自塞尔特语的]
ultimately from Latin asinus
最终源自 拉丁语 asinus

ass
ass 2

n.（名词）
【复数】 ass.es[2s.z] 【粗俗用语】 【俚语】

The buttocks.
屁股
The anus.
肛门
Sexual intercourse.
性交

来源：
Middle English ars
中古英语 ars
from Old English ears * see ors-
源自 古英语 ears *参见 ors-