6 letters · 7 points in Scrabble
noun the quality of being valid and rigorous
noun something hard to endure
noun excessive sternness
originFrom Middle English rigour, from Anglo-Norman, from Old French rigor, from Latin rigor (“stiffness, rigidity, rigor, cold, harshness”), from rigere (“to be rigid”). Compare French rigueur.
Etymology from Wiktionary, CC BY-SA 3.0