culpable (adj.)youdaoicibaDictYouDict[culpable 词源字典]
late 13c., coupable, from Old French coupable (12c., Modern French coupable), from Latin culpabilis "worthy of blame," from culpare "to blame," from culpa "crime, fault, blame, guilt, error." English (and for a time French) restored the first Latin -l- in later Middle Ages.[culpable etymology, culpable origin, 英语词源]