familiarity/fəˌmɪliˈærəti/复数形式familiarities1知识, 熟悉personal knowledge or information about someone or something同义词： acquaintanceconversancyconversance2熟悉, 知识usualness by virtue of being familiar or well known反义词： unfamiliarity3熟悉, 友谊close or warm friendship同义词： intimacycloseness4过分亲昵an act of undue intimacy同义词： indecorumimproprietyliberty5熟悉, 随意a casual manner同义词： casualness