Culpable
Middle English (in the sense ‘deserving punishment’): from Old French coupable, culpable, from Latin culpabilis, from culpare ‘to blame’, from culpa ‘fault, blame’.
wiktionary
From Middle English culpable, from Old French culpable, from Latin culpabilis(“blameworthy”), from culpare(“to blame, condemn”), from culpa(“fault, crime, mistake”).
etymonline
culpable (adj.)
"deserving censure, blameworthy," 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." De Vaan writes that this might be from a PIE root *kuolp- "to bend, turn" (source also of Greek kolpos "bosom, lap;" see gulf (n.)). According to his sources, "The original meaning of culpa is 'a state of error' rather than 'an error committed'." English (and for a time French) restored the first Latin -l- in later Middle Ages. Related: Culpably; culpableness.
