11 letters · 15 points in Scrabble
adjective characterized by a lightly pert and exuberant quality
adjective not pertinent to the matter under consideration
adjective improperly forward or bold
originInherited from Middle English impertinent, from Middle French impertinent, from Old French impertinent, from Latin impertinēns; by surface analysis, im- + pertinent.
Etymology from Wiktionary, CC BY-SA 3.0