Last Updated：2025/11/29

(transitive, simile) To have an extensive and penetrating understanding of (something or someone).

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know like a book

Source Word

know like a book

Verb

transitive

(transitive, simile) To have an extensive and penetrating understanding of (something or someone).

Japanese Meaning

対象を熟知している、全て把握している / 徹底的に理解している、精通している / 物事や人物について、深く広く知り尽くしている

After ten years as partners, I know like a book her strengths and weaknesses.

パートナーとして10年一緒にやってきたので、彼女の長所と短所を熟知しています。

Sense（1）

(transitive, simile) To have an extensive and penetrating understanding of (something or someone).

"He's a bad man, that John Mason, and my advice to you and to every one, is to keep clear of him. I know him like a book."

knows like a book

（ present singular third-person ）

knowing like a book

（ participle present ）

knew like a book

（ past ）

known like a book

（ participle past ）