rotund adj. + Add to list US //ɹoʊˈtənd// UK //ɹəʊtˈʌnd// ro·tund SynonymsEtymology Synonyms corpulentobeseorotundpear shapedroundweightyOriginINE-PRO*Hreth₂-→LATrota→ENrotund Learned borrowing from Latin rotundus (“round”), from Latin rota (“wheel”), from Proto-Indo-European *Hreth₂- (“to run, to roll”). Doublet of round.