1 not habituated to; unfamiliar with; "unaccustomed to wearing suits" [ant: accustomed]
2 not customary or usual; "an unaccustomed pleasure"; "many varieties of unaccustomed foods"; "a new budget of unaccustomed austerity"
- Not accustomed
- He is unaccustomed to the cold.
a novice at, a stranger to, callow, curious, disaccustomed, fresh, green, green as grass, ignorant, immature, inexperienced, new, new to, peculiar, rare, raw, rusty, strange, unaccustomed to, unacquainted with, unanticipated, uncommon, unconversant, unconversant with, undeveloped, unexpected, unexperienced, unfamiliar, unfamiliar with, unfledged, unhabituated, unhardened, uninitiated in, uninured, unmatured, unpracticed, unpracticed in, unprecedented, unripe, unseasoned, unskilled in, untrained, untried, unused, unused to, unusual, unversed, unversed in, unwonted, weaned