vigilant
🇺🇸
/ˈvɪdʒɪlənt/
🇬🇧
/ˈvɪdʒɪlənt/
Being watchful and quick to detect danger or trouble
The security guard remained vigilant throughout the night to ensure the safety of the building's occupants.
경비원은 밤새도록 경계를 유지하여 건물 주민들의 안전을 보장했습니다.