Condone means to overlook or silently forgive an offensive, usually a serious one.
Condone is a verb.
Synonyms: disregard, let pass, overlook, ignore, put up with.
Antonyms: censure, denounce, disapprove.
The principal could not condone the student's actions, especially for copying in the exam.
His parents condoned Naveen's drinking by simply ignoring it.