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Phrase(s): hit the nail (right) on the head
1. Lit. to strike a nail precisely on the head with a hammer. • If you expect to drive a nail straight, you have to hit the nail on the head. 2. Fig. to do exactly the right thing; to do something in the most effective and efficient way. • You’ve spotted the flaw, Sally. You hit the nail on the head. • Bob doesn’t say much, but every now and then he hits the nail right on the head.
McGrawhill's American Idioms And Phrasal Verbs