Vigilant
Adjectiveचेतावनीपूर्ण, सतर्क
Definition
Carefully alert to danger or potential problems; watchful.
Contextual Sentence: "The police maintained *vigilant* surveillance during the protest to prevent violence."
💡 Memory Hook (Mnemonic): Vigil + Ant → 'Guardian' (like a watchful guardian).
Synonyms
watchful
alert
vigilant
Antonyms
careless
unaware
drowsy