Thrive

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Middle English (originally in the sense ‘grow, increase’): from Old Norse thrífask, reflexive of thrífa ‘grasp, get hold of’. Compare with thrift.

wiktionary

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From Middle English thryven, thriven, from Old Norse þrífa(“to seize, grasp, take hold, prosper”) (Swedish trivas), from Proto-Germanic *þrībaną(“to seize, prosper”), from Proto-Indo-European *trep-, *terp-(“to satisfy, enjoy”).

etymonline

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thrive (v.)

c. 1200, from a Scandinavian source akin to Old Norse þrifask "to thrive," originally "grasp to oneself," probably reflexive of þrifa "to clutch, grasp, grip, take hold of" (compare Norwegian triva "to seize," Swedish trifvas, Danish trives "to thrive, flourish"), of unknown origin. Related: Thrived (or throve); thriving.