Etymograph

English

backlash

From back- + lash.

Formed from back- + lash

Proto-Germanic *laskô ‘flap of fabric, strap’

Middle English lashe ‘a stroke’

English lash

Today it means

noun A suddenly reversed or backward motion, such as of a rope or elastic band when it snaps under tension.

Language periods are conventional ranges, not dates for this word.

Etymograph / backlash