*deafen*

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. [ 1913 Webster ]

Deafened and stunned with their promiscuous cries. Addison. [ 1913 Webster ]

2. (Arch.) To render impervious to sound, as a partition or floor, by filling the space within with mortar, by lining with paper, etc. [ 1913 Webster ]