unshifting

10 LETTERS · 3 SYLLABLES · STARTS WITH U

unshifting is a valid 10-letter word worth 17 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

U1N1S1H4I1F4T1I1N1G2

1 + 1 + 1 + 4 + 1 + 4 + 1 + 1 + 1 + 2 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does unshifting mean?