6 letters · 10 points in Scrabble
verb make worse or less effective
verb make imperfect
originFrom Middle English impairen, empeiren, from Old French empeirier, from Early Medieval Latin impeiōrāre, from in- + Late Latin peiōrāre (“worsen”), from peiōrem (“worse”), comparative of malus (“bad”).
Etymology from Wiktionary, CC BY-SA 3.0