very careful to notice any signs of danger or trouble synonym alert, watchful警觉的;警惕的;警戒的;谨慎 A pilot must remain vigilant at all times. 飞行员必须随时保持警惕。 The thief was spotted by vigilant neighbours. 警惕的邻居发现了小偷。 The organization is ever vigilant for threats to the habitats of birds. 该组织对鸟类栖息地所面临的种种威胁始终保持警惕。 You need to be vigilant against garden pests. 你要警惕花园里的害虫。
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’.