backward motion

15 LETTERS · STARTS WITH B

backward motion is a valid 15-letter word worth 28 points in Scrabble and 32 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3A1C3K5W4A1R1D2M3O1T1I1O1N1

3 + 1 + 3 + 5 + 4 + 1 + 1 + 2 + 0 + 3 + 1 + 1 + 1 + 1 + 1 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does backward motion mean?