indubitability

NOUN /ɪn,dubɪtə'bɪlɪti/
14 LETTERS · 7 SYLLABLES · STARTS WITH I

indubitability is a valid 14-letter word worth 22 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
I1N1D2U1B3I1T1A1B3I1L1I1T1Y4
1 + 1 + 2 + 1 + 3 + 1 + 1 + 1 + 3 + 1 + 1 + 1 + 1 + 4 =22 PTS
DOUBLE WORD → 44TRIPLE WORD → 66
MEANING

What does indubitability mean?