adjective
a word that describes or modifies a noun or pronoun, in this case 'unsatisfied' describes a feeling of not being content or fulfilled
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The customer was unsatisfied with the quality of the product and requested a refund.
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I'm feeling unsatisfied with my current job and thinking about looking for a new one.
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She's always complaining about being unsatisfied with everything, it's so annoying.
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His hunger for success was insatiable, always leaving him feeling unsatisfied no matter how much he achieved.