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Diarrhea

/ˌdaɪəˈriːə/noun

Frequent loose or watery bowel movements.

The Greek roots

διά
diá
through
+
ῥεῖν
rheîn
to flow

Literally: a flowing through

The story of the word

Hippocratic writers used diárroia for precisely what it says: matter running straight through. The second half is the verb behind rheum, rheumatism and catarrh, all named for fluids thought to run where they should not. The spelling splits by ocean, diarrhea in America and diarrhoea in Britain, and both keep the doubled r that carries the Greek rho.

How it travelled
Ancient Greek → Late Latin → Old French → English
First recorded
14th century

Same family

catarrhrheumhemorrhage

In a sentence

Half the camp had diarrhea by the third day, and the well was the obvious suspect.

Built on the same root

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