fluid
flu·id/ˈflu.ɪd/noun, adjective
fluid is spelled F-L-U-I-D: 5 letters and 2 syllables (flu·id). It appears 17 times per million words in written English, the 4,934th most frequent word form (wordfreq, 2021 data). As a noun, fluid 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” (English Wiktionary, September 2026). The plural of fluid is fluids.
How many letters and syllables are in fluid?
| Letters | 5: F-L-U-I-D |
|---|---|
| Syllables | 2: flu·id |
| In writing | 17 times per million words; the 4,934th most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is fluid?
Fluid appears 17 times per million words in written English, the 4,934th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce fluid?
- UK /ˈfluːɪd/
- British /ˈflʉwɪd/
- US /ˈflu.ɪd/
Fluid has 2 syllables, split flu·id in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-fluid.ogg, Wikimedia Commons (author and licence on each file's page).
What rhymes with fluid?
One word on PlainSpell end in the same sounds as fluid from its last stressed vowel (/uɪd/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of fluid
- fluids plural
- more fluid comparative
- most fluid superlative
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does fluid mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
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.
- 2
A liquid (as opposed to a solid or gas).
- 3
colloquialIntravenous fluids.
adjective
- 1
Of or relating to fluid.
- 2
In a state of flux; subject to change.
- 3
Moving smoothly, or giving the impression of a liquid in motion.
- 4
Convertible into cash.
- 5
rareGenderfluid.
Oh, Loki made sure of that. My mortal parents blamed him for the way I was, for being fluid.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you abbreviate fluid?
Wiktionary records one abbreviation of fluid: fld..
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Fluid in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | fluide , liquide |
| German | Fluid, Flüssigkeit , flüssig , fließend |
| Portuguese | fluido , líquido |
| Spanish | fluido |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does fluid come from?
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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).