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Phrase(s): No one is indispensable.
Prov. Anyone may become unnecessary; anyone may lose his or her job. • Fred: You can’t fire me. I’m absolutely necessary to this company. Nancy: No one is indispensable, Fred. • The housekeeper was sure that her employer would always need her, but she discovered when she was let go that no one is indispensable.
McGrawhill's American Idioms And Phrasal Verbs