unnavigableness

15 LETTERS · 6 SYLLABLES · STARTS WITH U

unnavigableness is a valid 15-letter word worth 21 points in Scrabble and 29 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

U1N1N1A1V4I1G2A1B3L1E1N1E1S1S1

1 + 1 + 1 + 1 + 4 + 1 + 2 + 1 + 3 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does unnavigableness mean?