He is receiving treatment for inversion of the foot.

His foot is exhibiting inversion.

He likes to take a walk in the park at dusk.

He worked as a rear gunner in a fighter plane.

He entered the forest with a shotgun.

He received training to handle a heavy machine gun.

He is good at handling a light machine gun.

They are always together like the Three Musketeers at school.

He started walking around the room in an anticlockwise direction.

Retroflex sounds are difficult to pronounce.