IdiomDaily LifeFrench

Être sur le qui-vive

Meaning: To be tensely alert.

Literally: To be on the who-lives

Example: “Depuis les cambriolages, tout le quartier est sur le qui-vive.” — Since the burglaries, the whole neighborhood has been on its toes.

English equivalent: On one's toes

Equivalents in other languages

Origin: Qui vive? was the sentry's challenge, meaning roughly whose side are you on — the expected answer named a king. Being on it is being in the state of readiness the challenge implies.

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