unwonted (adj.)

• abnormal
• atypical
• breakaway
• extraordinary
• ignorant
• inexperienced
• infrequent
• irregular
• odd
• offbeat
• peculiar
• rare
• recherche
• rusty
• singular
• strange
• unaccustomed
• uncommon
• unconventional
• unexpected
• unfamiliar
• unhardened
• unheard-of
• unimaginable
• unique
• unorthodox
• unpracticed
• unprecedented
• unseasoned
• unthinkable
• unthought-of
• untrained
• unused
• unusual
• weaned