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TOEFL IELTS BNC: 14346 COCA: 11523

vigilant

adjective
/ˈvɪdʒɪlənt/
/ˈvɪdʒɪlənt/
(formal)
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  1. very careful to notice any signs of danger or trouble警觉的;警惕的;警戒的;谨慎 synonym alert, watchful
    • 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
    adverb
    • extremely
    • very
    • especially
    preposition
    • about
    • against
    See full entry
    Word Originlate 15th cent.: from Latin vigilant- ‘keeping awake’, from the verb vigilare, from vigil ‘awake’.

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