[wak], (Verb)

Definitions:
- strike forcefully with a sharp blow
(e.g: his attacker whacked him on the head)


Phrases:
- at a whack
- out of whack
- top whack

Origin:
early 18th century: imitative, or perhaps an alteration of thwack

[wak], (Noun)

Definitions:
- a sharp or resounding blow
(e.g: with a few whacks and some loud whistles, they drove the animals away)

- a try or attempt
(e.g: we decided to take a whack at spotting the decade's trends)

- a specified share of or contribution to something
(e.g: motorists pay a fair whack for the use of the roads through taxes)


Phrases:
- at a whack
- out of whack
- top whack

Origin:
early 18th century: imitative, or perhaps an alteration of thwack