Etymology

fluid

flu·id
F4L1U1I1D2

Today it means: 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. Full definition →

Middle English fluid ← Latin fluidus ← Proto-Indo-European *dʰeh₁-
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The story

  1. Proto-Indo-European*bʰel-
  2. Proto-Indo-European*bʰlewH-
  3. Proto-Indo-European*bʰluH-yé-ti?
  4. Latinfluō
  5. Proto-Indo-European*dʰeh₁-
  6. Latinfluidus
  7. Middle Englishfluid
  8. English todayfluid

From Middle English fluid, from Latin fluidus (“flowing; fluid”), from Latin fluō (“to flow”), from Proto-Indo-European *bʰleh₁- (“to swell; surge; overflow; run”). Akin to Ancient Greek φλύειν (phlúein, “to swell; overflow”). Not related to English flow, which is a native, inherited word from *plew-, but is distantly related from English bleat.

Words from the same roots

Latinfluō all →

fluvaquent

Proto-Indo-European*bʰleh₁- all →

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Etymology from Wiktionary, CC BY-SA 4.0.