nebulous
adjective/ˈnebjələs/
/ˈnebjələs/
(formal)- not clear synonym vague
- a nebulous concept
Oxford Collocations DictionaryNebulous is used with these nouns:- concept
Word Originlate Middle English (in the sense ‘cloudy’): from French nébuleux or Latin nebulosus, from nebula ‘mist’. The current sense dates from the early 19th cent.Want to learn more?
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nebulous