keep still

10 LETTERS · STARTS WITH K

keep still is a valid 10-letter word worth 15 points in Scrabble and 18 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

K5E1E1P3S1T1I1L1L1

5 + 1 + 1 + 3 + 0 + 1 + 1 + 1 + 1 + 1 =15 PTS

DOUBLE WORD → 30TRIPLE WORD → 45

MEANING

What does keep still mean?