vigilant
adjective /ˈvɪdʒɪlənt/
/ˈvɪdʒɪlənt/
(formal)- very careful to notice any signs of danger or trouble synonym alert, watchful
- A pilot must remain vigilant at all times.
- The thief was spotted by vigilant neighbours.
- The organization is ever vigilant for threats to the habitats of birds.
- You need to be vigilant against garden pests.
Oxford Collocations Dictionaryverbs- be
- keep
- remain
- …
- extremely
- very
- especially
- …
- about
- against
Word Originlate 15th cent.: from Latin vigilant- ‘keeping awake’, from the verb vigilare, from vigil ‘awake’.