He is as deaf as a post [ stone , door - post , door - nail , an adder ].

他完全聋 了.

《现代汉英综合大词典》

The old man standing there is stone deaf.

站在那儿的老人完全聋了.

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The old man was deaf as a post, it was impossible to whisper to him.

那老人已经完全聋了, 根本不可能向他耳语.

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My grandfather is as deaf as a block.

我祖父的耳朵完全聋了.

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