kindly (adj.)youdaoicibaDictYouDict[kindly 词源字典]
early 14c., from Old English gecyndelic "natural, innate; suitable, lawful;" see kind (adj.) + -ly (1). Related: Kindliness.[kindly etymology, kindly origin, 英语词源]
kindly (adv.)youdaoicibaDictYouDict
"with kind feelings," Old English gecyndelice; see kind (adj.) -ly (2).