well-thriven

well-thriven (comparative more well-thriven, superlative most well-thriven)

1. (now chiefly Scotland, England regional) That has developed well; flourishing, thriving, healthy. [from 14th c.]
   • 1748, [Samuel Richardson], “Letter XLVI”, in Clarissa. Or, The History of a Young Lady: […], volume (please specify |volume=I to VII), London: […] S[amuel] Richardson;  […], →OCLC:

     Then I have a sort of quarrel against his face, though in his person, for a well-thriven man, tolerably genteel.