know (someone or something) like a book

To thoroughly and completely understand someone's emotions, motivations, etc., or how something works. After 30 years of marriage, my wife and I know each other like a book. Let's ask Jeff—he knows the security system like a book.See also: book, know, like

know like a book

Also, know like the back of one's hand or know backwards and forwards. Be extremely familiar with or knowledgeable about; understand perfectly. For example, I know Greg like a book-I'm sure he'll come, or I know this town like the back of my hand, or John knew his part backwards and forwards. The first of these hyperbolic idioms, dating from the early 1800s, has a close cousin in read like a book, which means "to discern someone's intent," as in I can read Greg like a book; also see under open book. The second ( back of hand) dates only from the mid-1900s. Also see backwards and forwards, def. 2; inside out, def. 2; know all the answers. See also: book, know, like

单词	know (someone or something) like a book
释义	know (someone or something) like a book know (someone or something) like a book To thoroughly and completely understand someone's emotions, motivations, etc., or how something works. After 30 years of marriage, my wife and I know each other like a book. Let's ask Jeff—he knows the security system like a book.See also: book, know, like know like a book Also, know like the back of one's hand or know backwards and forwards. Be extremely familiar with or knowledgeable about; understand perfectly. For example, I know Greg like a book-I'm sure he'll come, or I know this town like the back of my hand, or John knew his part backwards and forwards. The first of these hyperbolic idioms, dating from the early 1800s, has a close cousin in read like a book, which means "to discern someone's intent," as in I can read Greg like a book; also see under open book. The second ( back of hand) dates only from the mid-1900s. Also see backwards and forwards, def. 2; inside out, def. 2; know all the answers. See also: book, know, like
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