adjective
a word that describes or modifies a noun or pronoun, in this case 'unpromising' describes something that does not show potential for success or development
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The initial results of the experiment were unpromising, but further analysis may reveal more insights.
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I know it looks unpromising now, but don't give up hope just yet.
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The job market is looking pretty unpromising right now, but I'm sure something will come up soon.
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The storm clouds gathering on the horizon painted an unpromising picture for the outdoor event.