名詞 winnow:

1. the act of separating grain from chaff
   同義詞：winnowing, sifting

動詞 winnow:

1. separate the chaff from by using air currents
   同義詞：fan
2. blow on
3. select desirable parts from a group or list
   同義詞：cull out
4. blow away or off with a current of air

1. A device for winnowing grain.
   簸谷器; 風選機去糠的設(shè)備
2. The girl is winnowing the chaff from the corn.
   那個女孩正在簸去谷殼。

win.now

v.（動詞）
win.nowed,win.now.ing,win.nows
v.tr.（及物動詞）

To separate the chaff from (grain) by means of a current of air.
簸，揚（谷物）：通過風吹使谷殼脫離（谷物）
To rid of undesirable parts.
去除，使分離：去除不想要的部分
To blow (chaff) off or away.
吹掉：吹去，吹走（谷殼）
To blow away; scatter.
吹走；吹散
To blow on; fan:
吹動；扇動：
例句：
a breeze winnowing the tall grass.
微風吹過高高的草地

To examine closely in order to separate the good from the bad; sift.
篩選，選取：為把好的從壞的中分開而仔細檢查；篩分

To separate or get rid of (an undesirable part); eliminate:
去除：分開或除掉（不想要的部分）；排除：
例句：
winnowing out the errors in logic.
排除邏輯中的錯誤

To sort or select (a desirable part); extract.
挑選：分出或挑選出（想要的部分）；提取
v.intr.（不及物動詞）
To separate grain from chaff.
揚谷，簸谷：谷物從谷殼中分出
To separate the good from the bad.
區(qū)分好壞：把好的與壞的分開
n.（名詞）
A device for winnowing grain.
簸谷器；風選機：去糠的設(shè)備
An act of winnowing.
去糠：簸、揚的行為

來源：
Middle English winnewen
中古英語 winnewen
alteration of windwen
windwen的變化
from Old English windwian
源自 古英語 windwian
from wind [wind] * see wind
源自 wind [風] *參見 wind

【引伸】
win.nower
n.（名詞）