/ fəˌmɪliˈærəti; NAmE / noun [ U ]
1.
familiarity (with sth) | familiarity (to sb) the state of knowing sb/sth well; the state of recognizing sb/sth :
His familiarity with the language helped him enjoy his stay.
When she saw the house, she had a feeling of familiarity.
2.
a friendly informal manner :
She addressed me with an easy familiarity that made me feel at home.
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IDIOMS
- familiarity breeds contempt
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WORD ORIGIN
Middle English (in the senses close relationship and sexual intimacy ): via Old French from Latin familiaritas , from familiaris familiar, intimate, from familia household servants, family, from famulus servant.