Deafness is when you can't hear very well or at all. People who are deaf can't hear sounds like music, birds singing, or people talking.
The deafness was caused by a genetic disorder.
Noun: deafness.
Adjective: deaf.
Verb: deafen, deafened, deafening.
Adverb: deafly.
The word "deafness" comes from the Old English word "deaf", which means "unable to hear". The Old English word "deaf" is ultimately derived from the Proto-Germanic word *taub-az, which also means "unable to hear".
What is deafness?