7 letters · 9 points in Scrabble
noun a square hole made to receive a tenon and so to form a joint
verb cut a hole for a tenon in
verb join by a tenon and mortise
originFrom Middle English morteys, from Old French mortaise, from Arabic مُرْتَزّ (murtazz, “fastened”), from اِرْتَزَّ (irtazza).
Etymology from Wiktionary, CC BY-SA 3.0