15 letters · 26 points in Scrabble
adjective not inclined to talk or give information or express opinions
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 communicative English uncommunicative From un- + communicative.
Etymology from Wiktionary, CC BY-SA 3.0