Is deafing a verb noun or adjective?

The Word 'deafing' is not a Word in English.

The Word 'deafening' is the present participle of the verb 'to deafen'. The present participle of the verb is also an adjective, and a gerund, a verbal noun. Examples:

Verb: He was deafening the mounting rumors with some Propaganda of his own.

Adjective: The deafening music is not helping you study.

Noun: The deafening of the puppy was noticed by the vet.