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behind one's back
01
without one knowing or approving
Idiom
InformalWhat is the origin of the idiom "behind one's back" and when to use it?
The origin of the idiom "behind one's back" is not attributed to a specific historical event or source but rather emerges from the metaphorical association of a person's back with their unawareness or lack of visibility. The phrase draws upon the idea that when someone's back is turned or facing away, they cannot see what is happening behind them. It is commonly used when discussing interpersonal relationships, workplace dynamics, or social interactions.
例
Betraying a friend by spreading rumors about them behind their back is not a sign of loyalty
The club is having to improve the team with one hand tied behind its back because it has no money to spend on new players.
The basketball player managed to flip the ball behind his back before making an impressive shot.
He showed his mean streak by mocking his coworker's appearance behind their back.
The police officer pinioned the suspect's arms behind their back.
