un ‧ fa ‧ mil ‧ i ‧ ar /ˌʌnfəˈmɪliə◂ $ -ər◂/ BrE AmE adjective
[ Word Family: noun : ↑ familiarity ≠ ↑ unfamiliarity , ↑ family , ↑ familiarization ; adjective : ↑ familiar ≠ ↑ unfamiliar , ↑ familial ; verb : ↑ familiarize ; adverb : ↑ familiarly ]
1 . not known to you
unfamiliar surroundings/place/environment etc
She stood on deck to gaze at the unfamiliar surroundings.
a crowd of unfamiliar faces
unfamiliar to
Some of the technical vocabulary may be unfamiliar to you.
2 . be unfamiliar with something to not have any experience of something:
We were unfamiliar with the neighbourhood.
—unfamiliarity /ˌʌnfəmɪliˈærəti, ˌʌnfəmɪliˈærɪti/ noun [uncountable]