DEAFEN

Deaf″en (?), v. t. [imp. & p. p. Deafened (?); p. pr. & vb. n. Deafening.] [[From Deaf.]] 1. 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. 2. (Arch.) To render impervious to sound, as a partition or floor, by filling the space within with mortar, by lining with paper, etc.