Vigilant (adjective):Meaning: Keeping careful watch for possible danger or difficulties.Bengali Meaning: যে কোন বিপদ সম্বন্ধেসদা সতর্কSynonym: observant, sharp-eyed, keen-eyed, gimlet-eyed, eagle-eyed, hawk-eyed, with eyes like a hawk, with one's eyes open, keeping one's eyes peeled, keeping one's eyes skinned, attentive, paying attention, alert, on the alert, Antonym: negligent, inattentiveSource: Oxford Dictionary