10 letters · 22 points in Scrabble
noun last 2 million years
noun the cardinal number that is the sum of three and one
adjective consisting of or especially arranged in sets of four
originDerived from Latin quaternārius (“containing or consisting of four”), from quaternī (“four each”, “four at a time”) + -ārius (whence the English suffix -ary); compare the French quaternaire.
Etymology from Wiktionary, CC BY-SA 3.0