deafness
n. 聋;听力不佳
例句
Because of her deafness she was hard to make conversation with.
由于她失聪,和她交流很困难。
《柯林斯英汉双解大词典》
Remember that deafness isn't the same as being stupid.
记住,聋跟蠢不一样。
Deafness can be inherited.
耳聋是可以遗传的。