Let's get going.

The phrase "let's get going" is a common colloquial expression in English. It is a contraction of "let us get going." * **Let's:** This is a contraction of "let us." The word "let" comes from Old English "lætan," meaning "to allow, permit, leave undone." It has Germanic roots. * **Get:** This verb comes from Old Norse "geta," meaning "to obtain, reach, beget." In this context, "get" functions as part of a phrasal verb, indicating movement or initiation. * **Going:** This is the present participle of the verb "go." "Go" comes from Old English "gān," meaning "to move, walk, depart." Combined, the phrase suggests an initiation of movement or activity. It's a direct and informal way to encourage a group to start something or to leave. Its usage became more common in the 20th century as English became more casual.