fluid

 
Pronunciation: /ˈfluːɪd/

noun

  • a substance that has no fixed shape and yields easily to external pressure; a gas or (especially) a liquid: body fluids [mass noun]: a bottle of cleaning fluid

adjective

  • 1(of a substance) able to flow easily: the paint is more fluid than tube watercolours
  • smoothly elegant or graceful: her movements were fluid and beautiful to watch
  • not settled or stable; likely or able to change: our plans are still fluid the fluid political situation of the 1930s
  • 2(of a clutch or coupling) using a liquid to transmit power.

Derivatives

fluidity

Pronunciation: /-ˈɪdɪti/
noun

fluidly

adverb

Origin:

late Middle English (as an adjective): from French fluide or Latin fluidus, from fluere 'to flow'