uto-aztecan language

NOUN
20 LETTERS · STARTS WITH U

uto-aztecan language is a valid 20-letter word worth 31 points in Scrabble and 39 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
U1T1O1-0A1Z10T1E1C3A1N1L1A1N1G2U1A1G2E1
1 + 1 + 1 + 0 + 1 + 10 + 1 + 1 + 3 + 1 + 1 + 0 + 1 + 1 + 1 + 2 + 1 + 1 + 2 + 1 =31 PTS
DOUBLE WORD → 62TRIPLE WORD → 93
MEANING

What does uto-aztecan language mean?