unless that

11 LETTERS · STARTS WITH U

unless that is a valid 11-letter word worth 13 points in Scrabble and 15 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

U1N1L1E1S1S1T1H4A1T1

1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 4 + 1 + 1 =13 PTS

DOUBLE WORD → 26TRIPLE WORD → 39

MEANING

What does unless that mean?