sreu- / Indo-European roots

sreu-

To flow.

1. Suffixed o-grade form *srou-mo-.
a. stream from Old English strēam, stream;
b. maelstrom from Middle Dutch stroom, stream. Both a and b from Germanic *straumaz, stream.
2. Basic form *sreu-.
a. rheo-, -rrhea; catarrh, diarrhea, hemorrhoid, rhyolite from Greek rhein, to flow, with o-grade rhoos, flowing, a flowing;
b. suffixed form *sreu-mn̥. rheum from Greek rheuma, stream, humor of the body.
3. Suffixed zero-grade form *sru-dhmo-. rhythm from Greek rhuthmos, measure, recurring motion, rhythm.
4. Suffixed zero-grade form *sru-to-. rhyton from Greek rhutos, fluid, liquid.
5. Perhaps zero-grade extended form *srug-. sastruga from Russian struga, deep place.

[Pokorny sreu- 1003.]



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