15 letters · 22 points in Scrabble
adjective so rude and abusive as to be unsuitable for parliament
originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English parliamentary English unparliamentary From un- + parliamentary.
Etymology from Wiktionary, CC BY-SA 3.0