inertia-reel seat-belt

22 LETTERS · STARTS WITH I

inertia-reel seat-belt is a valid 22-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

I1N1E1R1T1I1A1-0R1E1E1L1S1E1A1T1-0B3E1L1T1

1 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 1 + 1 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does inertia-reel seat-belt mean?