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English word fluid comes from Proto-Indo-European *bʰleh₁-, and later Proto-Italic *flowō (Flow.)
*bʰleh₁- (Proto-Indo-European)
*bʰley- (Proto-Indo-European)
*flowō (Proto-Italic)
Flow.
fluo (Latin)
I am soaked in. I flow, stream, pour.
fluidus (Latin)
Liquid, fluid, flowing. Soft, feeble, moist.
fluid (Middle English)
fluid (English)
Any substance which can flow with relative ease, tends to assume the shape of its container, and obeys Bernoulli's principle; a liquid, gas or plasma. (not comparable) Of or relating to fluid.. (of an asset) Convertible into cash.. (rare) Genderfluid.. In a state of flux; subject to change.. Moving smoothly, or giving the impression of a liquid in motion.