noun / verb
whack
WAK/wæk/
A sharp, forceful hit.
The carpenter gives the wooden peg a sharp whack with the mallet.

Etymology
Whack probably arose in imitation of the sound of a sharp, heavy blow. Its use as a verb turns that impact sound into the action of striking forcefully.
In context
I had to whack off a piece of the rock in order to see inside the rock.
More examples
- He accidentally whacked his knee on the coffee table.
- Two firm whacks knock the dirt from his boots.
- Stop whacking the fence with that stick.
Forms
whack · whacks · whacked · whacking