5 letters · 7 points in Scrabble
noun a social division of (usually preliterate) people
noun a federation (as of American Indians)
noun (biology) a taxonomic category between a genus and a subfamily
originPIE word *tréyes From Middle English tribe, tribu, from Old French tribu, from Latin tribus. Doublet of tribus.
Etymology from Wiktionary, CC BY-SA 3.0