unskillfulness

NOUN /ən'skɪlfəlnɛs/
14 LETTERS · 4 SYLLABLES · STARTS WITH U

unskillfulness is a valid 14-letter word worth 21 points in Scrabble and 28 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
U1N1S1K5I1L1L1F4U1L1N1E1S1S1
1 + 1 + 1 + 5 + 1 + 1 + 1 + 4 + 1 + 1 + 1 + 1 + 1 + 1 =21 PTS
DOUBLE WORD → 42TRIPLE WORD → 63
MEANING

What does unskillfulness mean?