ceilidh (n.)youdaoicibaDictYouDict[ceilidh 词源字典]
1875, from Irish céilidhe, from Old Irish céle "companion," from PIE *kei-liyo-, from root *kei- "beloved, dear," primarily "to lie; bed, couch" (see cemetery).[ceilidh etymology, ceilidh origin, 英语词源]