The idiom "bolt from the blue" is used to refer to a sudden, unexpected event or news that takes people by surprise. This expression is originated from the imagery of a clear, blue sky suddenly being disrupted by an unforeseen bolt of lightning. Here are five example sentences

What is the origin of the idiom "bolt from the blue" and when to use it?

Definiția și sensul cuvântului „bolt from the blue” în engleză

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