IPA: //ʌnˈwʌntɪd//
KK: /ʌnˈwoʊntɪd/
Not used to something; unusual or out of the ordinary.
Her unwonted behavior surprised everyone at the party.
Unwonted → It is formed from "un-" (meaning not) and "wonted" (from Old English "wont", meaning accustomed or used to). The word "unwonted" means not accustomed or unusual.
Think of 'not' ('un-') being added to 'accustomed' ('wonted') — that's why unwonted means something that is not usual or familiar.