ADV. sincerely | profusely He apologized profusely for the damage he had caused. | humbly I do apologize most humbly. | publicly
VERB + APOLOGIZE ought to, should | want to, wish to, would like to I would like to apologize most sincerely for any embarrassment caused.
PREP. for She apologized for being late. | to He apologized to his colleagues.
PHRASES I do/must apologize I must apologize for cancelling our meeting at such short notice.