Where does “ῥευματικός” come from?

ῥευματικός (Ancient Greek) comes from Ancient Greek ῥεῦμα, from Ancient Greek ῥέω, from Proto-Indo-European srew-, from Proto-Indo-European ser- — to flow; to guard; to bind, to tie together.

Ancestry of “ῥευματικός”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ῥεῦμα	stream, flow, current
2	Ancient Greek	ῥέω	I flow, stream, run, gush; I let flow, pour; I...
3	Proto-Indo-European	srew-	to flow, stream
4	Proto-Indo-European	ser-	to flow; to guard; to bind, to tie together

Words derived from “ῥευματικός”

rheumatic
antirheumatic
nonrheumatic
rheumatically
rheumaticky
rheumaticus
reumático
antirreumático
reumatico
reumatizzare
antireumatico
cardioreumatico
reumático
antirreumático
rheumatique

Every word from Proto-Indo-European ser- →

ῥευματικός — Etymology, Origin & Word History | Etymology Explorer