lash

Concise Oxford English Dictionary © 2008 Oxford University Press:
lash/laʃ/

▶verb

• 1 strike or beat with a whip or stick.

  ■ beat forcefully against: waves lashed the coast.

  ■ (lash out) hit or kick out.

  ■ (lash out) launch a verbal attack.

• 2 (of an animal) move (a part of the body, especially the tail) quickly and violently.

• 3 fasten securely with a cord or rope.

• 4 (lash out) Brit. spend money extravagantly.

▶noun

• 1 a sharp blow or stroke with a whip or stick.

• 2 the flexible leather part of a whip.

• 3 an eyelash.

– derivatives
-lashed adjective,
lasher noun,
lashless adjective.

– origin ME (in the sense ‘make a sudden movement’): prob. imitative.