/ rɪˈmɔːs; NAmE rɪˈmɔːrs/ noun
[ U ] remorse (for sth / for doing sth) the feeling of being extremely sorry for sth wrong or bad that you have done :
I felt guilty and full of remorse.
He was filled with remorse for not believing her.
► re·morse·ful / -fl; NAmE / adjective
► re·morse·ful·ly / -fəli; NAmE / adverb
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WORD ORIGIN
late Middle English : from Old French remors , from medieval Latin remorsus , from Latin remordere vex, from re- (expressing intensive force) + mordere to bite.