offendyoudaoicibaDictYouDict[offend 词源字典]
offend: [14] Latin offendere meant ‘strike against’. It was a compound verb formed from the prefix ob- ‘against’ and -fendere ‘hit’ (source also of English defend). Its literal sense survived into English (‘The navy is a great defence and surety of this realm in time of war, as well to offend as defend’ proclaimed an act of parliament of Henry VIII’s time), and continues to do so in the derivatives offence [14] and offensive [16], but as far as the verb is concerned only the metaphorical ‘hurt the feelings’ and ‘violate’ remain.
=> defend, fend[offend etymology, offend origin, 英语词源]
offend (v.)youdaoicibaDictYouDict
early 14c., "to sin against (someone)," from Old French ofendre "transgress, antagonize," and directly from Latin offendere "to hit, strike against," figuratively "to stumble, commit a fault, displease, trespass against, provoke," from ob "against" (see ob-) + -fendere "to strike" (found only in compounds; see defend).

Meaning "to violate (a law), to make a moral false step, to commit a crime" is from late 14c. Meaning "to wound the feelings" is from late 14c. The literal sense of "to attack, assail" is attested from late 14c.; this has been lost in Modern English, but is preserved in offense and offensive. Related: Offended; offending.