Turn

Turn on/off — To switch a machine or light on or off.

“Turn off the light, I’m trying to sleep!”

Turn around — To move so that you’re facing the opposite direction.

“Sally was about to get on the plane, but she turned around when someone called her name.”

Turn up — When someone that was lost is found unexpectedly.

“Anything I lose usually turns up under the couch. It’s my cat’s favorite hiding place.”