crag

From 13th century Middle English crag, from Middle Irish crec, a contracted form of Middle Irish carrac (compare Irish creig, Scottish Gaelic creag), possibly ultimately from the late Proto-Indo-European/substrate *kar (“stone, hard”); see also Old Armenian քար (kʻar, “stone”), Sanskrit खर (khara, “hard, solid”), Welsh carreg (“stone”).

出典: Wiktionary「crag」（CC BY-SA 4.0）