noun
Freq #197763
Meanings
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1
noun
lack of knowledge, experience, or acquaintance with someone or something
Her unfamiliarity with the notation made the proof difficult to follow.
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2
noun
the quality of seeming strange or not readily recognizable
Accurate analysis can initially produce a feeling of unfamiliarity.
Thesaurus
Etymology
From unfamiliar + -ity. Familiar comes from Latin familiaris ("of a household, intimate"), from familia ("household"); the negative noun names either lack of knowledge or the resulting sense of strangeness.