英语词源字典 - 在线词源网站

blunder (v.)[blunder 词源字典]: mid-14c., "to stumble about blindly," from a Scandinavian source akin to Old Norse blundra "shut one's eyes," from PIE root *bhlendh- (see blind). Meaning "make a stupid mistake" is first recorded 1711. Related: Blundered; blundering.[blunder etymology, blunder origin, 英语词源]
clinker (n.): "mass of slag," 1769, from klincard (1640s), a type of paving brick made in Holland, from Dutch klinkaerd, from klinken "to ring" (as it does when struck), of imitative origin. Also "a clinch-nail;" hence clinker-built (1769). The meaning "stupid mistake" is first recorded 1950 in American English; originally (1942) "a wrong note in music."