fraidy-cat (n.)youdaoicibaDictYouDict[fraidy-cat 词源字典]
"coward," by 1871, American English slang, from 'fraid (by 1816), childish or dialectal (African, West Indies) pronunciation of afraid, + cat (n.), perhaps in reference to the animals' instinct to scatter when startled.[fraidy-cat etymology, fraidy-cat origin, 英语词源]