His unwonted display of generosity took me by surprise.
There was an unwonted level of security around the palace yesterday.
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Cursing at his chef was an unwonted display of anger by the
king.
The tunnels were closed for repairs, creating an unwonted level
of traffic on the city bridges.
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habitual
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adj.
unaccustomed or unusual
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No. The word unwonted is the negative form of the past tense of the verb (to wont) and is used as an adjective, meaning unusual or unlikely (not the same as unwanted).