Apologize
Part of speech: verb
Definition: To make an apology or defence. To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends
Example sentence: I do not deny I brought most of my notoriety on myself, nor do I apologize for it.
Apologise
Part of speech: verb
Definition: To make an apology or defence.To make an apology or excuse; to make acknowledgment of some fault or offense, with expression of regret for it, by way of amends;—with for; as, my correspondent apologized for not answering my letter.To express regret that an event has occurred.