Noah Webster's Dictionary 1. (a.) Not wonted; unaccustomed; unused; not made familiar by practice; as, a child unwonted to strangers. 2. (a.) Uncommon; unusual; infrequent; rare; as, unwonted changes.

Multi-Version Concordance Unwonted (1 Occurrence) Isaiah 28:21 For Jehovah will rise up as on mount Perazim, he will be moved with anger as in the valley of Gibeon; that he may do his work, his strange work, and perform his act, his unwonted act. (DBY)