qui vive

uncountable

a state of heightened vigilance, especially prior to battle

Japanese Meaning

戦闘前などの危険な状況に備えて、非常に高い警戒心を持つ状態 / 臨戦態勢、または一層の注意を払っている状態

The sentry remained on the qui vive throughout the night, listening for any sign of movement.

哨兵は一晩中、警戒態勢にあり、何か動きがないか耳を澄ませていた。

Sense（1）

a state of heightened vigilance, especially prior to battle

"QUI vive!" The sentry's musket rings,

The channelled bayonet gleams;

High o'er him, like a raven's wings

The broad tri-colored banner flings