être vigilant signifie anglais

watch [watched, watching, watches]▼◼◼◼(to be vigilant)
verb
[UK: wɒtʃ] [US: ˈwɑːtʃ]

keep an eye out▼◼◻◻(to watch for)
verb

keep one's eyes peeled▼(to be watchful)
verb
[UK: kiːp wʌnz aɪz piːld] [US: ˈkiːp wʌnz ˈaɪz ˈpiːld]