adj. 变聋的
v. 耳聋；后天耳聋（deafen的过去分词）

[ adj ]
caused to hear poorly or not at all
<adj.all>

Deafen \Deaf"en\, v. t. [imp. & p. p. {Deafened}; p. pr. & vb.
n. {Deafening}.] [From {Deaf}.]
1. To make deaf; to deprive of the power of hearing; to
render incapable of perceiving sounds distinctly.

Deafened and stunned with their promiscuous cries.
--Addison.

2. (Arch.) To render impervious to sound, as a partition or
floor, by filling the space within with mortar, by lining
with paper, etc.

deafened \deafened\ adj.
rendered deaf.
[WordNet 1.5]