winnow
Word family adjectivewinnowednounwinnowerwinnowingverbwinnow
win·now /ˈwɪnəʊ $ -noʊ/ (also winnow down) verb 1 TA[transitiveT] to make a list, group, or quantity smaller by getting rid of the things that you do not need or want 筛选,选取 SYN whittle down We need to winnow the list of candidates to three. 我们需要把名单上的候选人删减到三位。
2.winnow somebody/something ↔ out phrasal verbphr v to get rid of the things or people that you do not need or want from a group 筛除〔不想要的人或物〕 Origin winnow Old English windwian