The deaf boy learns sign language.

The deaf person learns to communicate through sign language.

The alpine accentor is a bird that lives in the Alps.

I saw a group of sordoni flying over the lake.

The deaf-mute man has learned to communicate with sign language.

The deaf-mute has learned to communicate using sign language.

The deaf-mute women have learned sign language.

She is deaf and mute.

The deaf-mutes communicate through sign language.

Specialized teachers work with children affected by deaf-mutisms.