vigilant
🇺🇸
/ˈvɪdʒɪlənt/
🇬🇧
/ˈvɪdʒɪlənt/
adjective
R
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.
保安整夜保持警覺，以確保大樓住戶的安全。
translation
警惕的