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Middle English thraven (inherited)
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Middle English thrave (inherited)
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Middle English threve (mention)
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Middle English thrafe (mention)
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West Frisian drave (cognate)
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Proto-Indo-European *terp- (root)
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Proto-Indo-European *trep- (derived)
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Icelandic þrefa (cognate)
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Old Norse þrefi (derived)
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Old Norse þrifa (mention)
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Saterland Frisian droawje (mention)
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Swedish trava (cognate)
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Swedish trave (cognate)