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Apology

/əˈpɒlədʒi/

An expression of regret or sorrow for having done something wrong or causing inconvenience.

Synonyms:

My apologies again.

It's a pretty inadequate apology considering what I've cost her.

"I object and demand an apology."

Late 16th century from French apologie, via late Latin from Greek apologia meaning a speech in defense.

16 mentions per 1 million words

Moderate

Hint: Frequency according to COCA