vigilant

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

carefully observant or attentive;
on the lookout for possible danger
- a policy of open-eyed awareness
- the vigilant eye of the town watch
- there was a watchful dignity in the room
- a watchful parent with a toddler in tow
• Syn:
argus-eyed, open-eyed, wakeful
• Similar to:
alert, watchful
• Derivationally related forms:
wakefulness (for: wakeful), vigilance

• Từ đồng nghĩa / Synonyms:
  argus-eyed, open-eyed, wakeful