completely deaf
Refers to total deafness; often used in a somewhat blunt or colloquial manner. The term can be considered insensitive in modern usage.
He became completely deaf due to an accident.
Rare kanji spelling; the word is usually written in kana.
Alternate rare kanji spelling; the word is usually written in kana.
The origin is uncertain. The kanji 金 (metal) and 鉄 (iron) may be used metaphorically to suggest complete or solid deafness, but this is speculative.