On the qui vive and Paying attention

On the qui vive noun - Lively attentiveness.

Paying attention and on the qui vive are semantically related. In some cases you can use "Paying attention" instead an adjective phrase "On the qui vive".

Paying attention adjective - Taking heed; giving close and thoughtful attention.

On the qui vive and paying attention are semantically related. Sometimes you can use "On the qui vive" instead an adjective phrase "Paying attention".