From Longman Dictionary of Contemporary Englishdeafendeaf‧en /ˈdefən/ verb [transitive] 1 HEAR#if a noise deafens you, it is so loud that you cannot hear anything else2 HEAR#to make someone go deafGrammar Deafen is often used in the passive.→ See Verb table
Examples from the Corpus
deafen• We were deafened by the explosion.• Lampard was briefly stunned and deafened so that he couldn't hear himself.• The roar of the water deafened them. 