guilt; self-reproach; regret for having done wrong
When he heard that his sister had died, he was overwhelmed with remorse, thinking of all the many unkindnesses he had committed against her over the years, for which he had not apologized in time.
re (again)#mordere (to bite or sting) (Latin)
rem+ (w)orse. remembering (read recalling)the worse thing that u did. u feel the guilt.