unused to (adjective) unaccustomed: not prepared, ready; new
Sinonime: ignorant,
incompetent,
inexperienced, newcome, not given to, not used to,
novice, too green, unacquainted, unfamiliar with, uninformed, uninstructed, unpracticed, unseasoned, unskilled, untaught, untrained, unused to, unversed in
Antonime: accustomed,
prepared,
ready