pur sang \(ˈ)pu̇(ə)r|säⁿ\adjective Etymology: French pur-sang thoroughbred animal, from pur pure + sang blood, from Latin sanguis : being such beyond a doubt or to the utmost degree : pure-blooded — used postpositively < the contemplative poet pur sang — Louise Bogan > < denounce him as a fascist pur sang — Thomas Mann >