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general::
noun knowing sb/sth well ADJ. detailed, greater, intimate | basic VERB + FAMILIARITY have I had only a basic familiarity with computers. | acquire, gain Over the years, he gained greater familiarity with the culture and way of life in the country. PREP. ~ with her detailed familiarity with her subject PHRASES a lack of familiarity friendly informal manner ADJ. easy He treated her with the easy familiarity of an equal.
Oxford Collocations Dictionary