stumble
noun
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an unintentional but embarrassing blundertrip
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an unsteady uneven gaitlurchstagger
verb
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make an errortrip upslip up
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miss a step and fall or nearly fall“I stumbled over the tree root.”trip
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walk unsteadily“The drunk person stumbled about.”waddlefalterpaddledodderbumblecoggletottertoddle
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encounter by chance“I stumbled across a long-lost cousin last night in a restaurant”hit