His son was born with clubfoot.

In geomorphology, an antidune is a special type of sand dune that forms on the downstream side of a water flow.

He started walking around the room in an anticlockwise direction.

Retroflex sounds are difficult to pronounce.

He deeply studied the history of anti-Semitism.

We should always remember the power of Kannon in difficult times.

He is good at solving technical problems.

He always has an optimistic attitude.

His music is very avant-garde, and some people might not understand it.

He is facing economic problems.