Un·wont·ed a.
1. Not wonted; unaccustomed; unused; not made familiar by practice; as, a child unwonted to strangers.
2. Uncommon; unusual; infrequent; rare; as, unwonted changes. “Unwonted lights.”
-- Un*wont*ed*ly, adv. -- Un*wont*ed*ness, n.
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unwontedly
adv : in an unusual manner