bickering (n.)youdaoicibaDictYouDict[bickering 词源字典]
c. 1300, "a skirmish," from bicker (v.). Meaning "a verbal wrangle" is from 1570s.[bickering etymology, bickering origin, 英语词源]
bickering (adj.)youdaoicibaDictYouDict
1808 in the sense of "contentious," present participle adjective from bicker (v.). Earlier it was used to mean "flashing, quivering" (1660s).