印欧祖語*leyg-#-1跳ね回る・遊ぶto leap about, to playこの語源をもつ英単語foreknowledge予知knowledge知識knowledgeable知識豊富なlakelark気ままな冒険leachlek求愛場letchskylarkウタヒバリ・遊び戯れるunknowledgeable知識不足wedlock結婚
