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Phrase(s): See no evil, hear no evil, speak no evil.
Prov. Ignore any evil that you come in contact with; be virtuous even though there is evil around you. (Often represented by three monkeys, one of which is covering his eyes, one his ears, and one his mouth.) • Jill: Do you have any idea why Fred is staying in the office so late every night? Jane: Not me. Like the three little monkeys, I see no evil, hear no evil, speak no evil.
McGrawhill's American Idioms And Phrasal Verbs