nasty

英 ['nɑːstɪ] 美 ['næsti]

1. 形象记忆过程：nasty--- na(拼音那)+st(街道)+y(为什么)---那条街上为什么那么---脏。
2. 谐音“拿屎踢、拉屎的”→ 污秽的

nasty 厌恶的，下流的

词源不详，可能来自nose,鼻子，引申义难闻的，厌恶的，下流的。

nasty: nasty: [14] Nasty, now such a widespread term of disapproval, is not that ancient a word in English, and it is not too certain where it came from. In the 14th and 15th centuries it was often spelled naxty, and this, together with one early 17th-century example of nasky, has suggested some connection with Swedish dialect naskug ‘dirty, nasty’. And a link has also been proposed with Dutch nestig ‘dirty’, which may denote etymologically ‘made dirty like a bird’s nest’. ‘Dirty’ was the original sense of the English adjective; the more general ‘unpleasant’ did not begin to emerge until the end of the 17th century.
nasty (adj.): c. 1400, "foul, filthy, dirty, unclean," of unknown origin; perhaps [Barnhart] from Old French nastre "miserly, envious, malicious, spiteful," shortened form of villenastre "infamous, bad," from vilein "villain" + -astre, pejorative suffix, from Latin -aster.

Alternative etymology [OED] is from Dutch nestig "dirty," literally "like a bird's nest." Likely reinforced in either case by a Scandinavian source (compare Swedish dialectal naskug "dirty, nasty"), which also might be the source of the Middle English word. Of weather, from 1630s; of things generally, "unpleasant, offensive," from 1705. Of people, "ill-tempered," from 1825. Noun meaning "something nasty" is from 1935. Related: Nastily; nastiness.

1. They've picked up a really nasty infection from something they've eaten.: 他们因吃错东西而得了很严重的感染症。

2. Though he had a temper and could be nasty, it never lasted.: 虽然他爱发脾气，而且有时还很讨厌，但向来都只是一阵儿。

3. This was a nasty attack and the woman is still very shocked.: 这是一次恶意袭击，那女人仍然惊骇不已。

4. There's a nasty sort of rumour going around about it.: 关于这件事正有一则恶意的谣言在流传。

5. A spokesman said this firm action had defused a very nasty situation.: 一位发言人称这一坚决的行动缓和了极为棘手的局面。