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English definition of “the nitty-gritty”

the nitty-gritty

noun     /ˌnɪtiˈɡrɪti/
the important details of a subject or activity : English teachers should concentrate on the nitty-gritty of teaching grammar .Important and essential thingsInformation and messages
(Definition of the nitty-gritty noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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