The Oxford Thesaurus An A-Z Dictionary of Synonyms - unaccustomedadj.

1) unfamiliar, unusual, rare, unexpected, uncommon, unprecedented, unanticipated, curious, peculiar: They encountered unaccustomed hostility from local people. 2) unaccustomed to. unused to, inexperienced in or at, amateurish at, unpractised in or at, unfamiliar with, uninitiated in: Unaccustomed as I am to public speaking, I had better be brief.