- chaff (n.)
[chaff 词源字典]
- "husks," Old English ceaf "chaff," probably from Proto-Germanic *kaf- "to gnaw, chew" (cognates: Middle Dutch and Dutch kaf, German Kaff), from PIE root *gep(h)- "jaw, mouth" (see jowl (n.1)). Used figuratively for "worthless material" from late 14c.[chaff etymology, chaff origin, 英语词源]