vigilant vigilant /ˈvɪdʒələnt/

adjective

1. Carefully observant or attentive; on the lookout for possible danger  ( argus-eyed , open-eyed , vigilant , wakeful )
   carefully observant or attentive; on the lookout for possible danger
    A policy of open-eyed awareness
   a policy of open-eyed awareness
    The vigilant eye of the town watch
   the vigilant eye of the town watch
    There was a watchful dignity in the room
   there was a watchful dignity in the room
    A watchful parent with a toddler in tow
   a watchful parent with a toddler in tow