nebulous

 
Pronunciation: /ˈnɛbjʊləs/

adjective

  • 1in the form of a cloud or haze; hazy: a giant nebulous glow
  • another term for nebular.
  • 2(of a concept) vague or ill-defined: nebulous concepts like quality of life

Derivatives

nebulosity

Pronunciation: /-ˈlɒsɪti/
noun

nebulously

adverb

nebulousness

noun

Origin:

late Middle English (in the sense 'cloudy'): from French nébuleux or Latin nebulosus, from nebula 'mist'. nebulous (sense 2) dates from the early 19th century