unaccustomed

adjectives

not habituated to; unfamiliar with
"unaccustomed to wearing suits"
unaccustomed
antonym
accustomed
is similar to
unfamiliar
"new experiences"; "experiences new to him"; "errors of someone new to the job"
new
is similar to
infrequently exposed to
"feet unused to shoes"
unused
not customary or usual
"an unaccustomed pleasure"; "many varieties of unaccustomed foods"; "a new budget of unaccustomed austerity"
unaccustomed
is similar to
not usual or common or ordinary
"a scene of unusual beauty"; "a man of unusual ability"; "cruel and unusual punishment"; "an unusual meteorite"
unusual