The idiom "up to speed" likely originates from the world of transportation and speed measurement. This phrase originally referred to reaching a desired velocity or pace, particularly in the context of vehicles or machinery.. It can now be used in both formal and informal contexts to indicate that someone is well-informed and understands the current state of affairs or has caught up with the necessary knowledge or skills.

What is the origin of the idiom "up to speed" and when to use it?

Définition et signification de « up to speed » en anglais

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