noun / adjective
roundhouse
ROUND-house/ˈraʊndhaʊs/
A punch or kick delivered in a wide circular motion.
The martial artist lands a roundhouse kick on the padded training bag.

Etymology
The “round building” image may connect to the sweeping blow through a building housing machinery worked by circular movement. The source treats this connection as possible, not certain.
In context
we step right into a big roundhouse punch
More examples
- She ducks under a roundhouse and steps away.
- He practices roundhouses slowly to improve his balance.
- A roundhouse punch leaves his chin exposed.
Forms
roundhouse · roundhouses
Similar words
- hook
- A shorter curved punch thrown with a bent elbow.
- haymaker
- A powerful, usually wild swinging punch, never a kick.