1377, from O.Fr.
reume (13c.), from L.
rheuma, from Gk.
rheuma "stream, current, a flowing," from
rhein "to flow," from PIE base
*sreu- "to flow" (cf. Skt.
sravati "flows,"
srotah "stream;" Avestan
thraotah- "stream, river," O.Pers.
rauta "river;" Gk.
rheos "a flowing, stream;" O.Ir.
sruaim, Ir.
sruth "stream, river;" Welsh
ffrwd "stream;" O.N.
straumr, O.E.
stream, O.H.G.
strom (second element in
maelstrom); Lett.
strauma "stream, river;" Lith.
sraveti "to trickle, ooze;" O.C.S.
struja "river,"
o-strovu "island," lit. "that which is surrounded by a river;" Pol.
strumyk "brook").