Last Updated：2025/11/23

Dictionary quizzes to help you remember the meaning

Dictionary quizzes to help you remember the meaning

thick as a plank

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Source Word

thick as a plank

Adjective

informal not-comparable

(simile, informal) Very stupid.

Japanese Meaning

非常に愚かである、馬鹿であるという意味です。

What is this buttons?

Even after three explanations, he remained thick as a plank, refusing to understand the simple concept.

Google Translation / DeepL Translation

3回説明しても、彼は簡単な概念を理解しようとせず、非常に愚かだった。

Sense（1）

(simile, informal) Very stupid.

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