/ ˌʌnfəˈmɪliə(r); NAmE / adjective
1.
unfamiliar (to sb) that you do not know or recognize :
She felt uneasy in the unfamiliar surroundings.
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2.
unfamiliar with sth not having any knowledge or experience of sth :
an introductory course for students who are unfamiliar with computers
OPP familiar
► un·famili·ar·ity / ˌʌnfəˌmɪliˈærəti; NAmE / noun [ U ]