snag
noun
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an unforeseen obstaclerub
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an opening made forcibly as by pulling aparttear
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a dead tree that is still standing, usually in an undisturbed forest“a snag can provide food and a habitat for insects and birds”
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a sharp protuberance
verb
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hew jaggedly
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catch on a snag“I snagged my stocking”
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get by acting quickly and smartly“snag a bargain”