A person who loses their hearing and becomes deaf after learning spoken language is described as being deafened.

people born hearing who became deaf as adults, either suddenly after an injury or illness or over a long period, e.g. after exposure to loud noise.

caused to hear poorly or not at all

A person who was born with normal hearing but lost it either gradually or suddenly and is unable to understand speech without visual cues. Also referred to as "late-deafened."

Condition A deafened character cannot hear. She takes a -4 penalty on initiative checks, automatically fails Listen checks, and has a 20% chance of spell failure when casting spells with verbal components. Characters who remain deafened for a long time grow accustomed to these drawbacks and can overcome some of them.