He believes in his own strength.

You always become my strength, thank you very much.

He was taken to the hospital because of dyspnea.

They are my best friends.

She suffers every month because of dysmenorrhea.

He is suffering from aphasia as a sequelae of stroke.

A healthy diet and moderate exercise help boost immunity.

He is an expert in mechanics.

The Earth maintains its shape due to centrifugal force.

He has a strong ability to get things done to make the project successful.