The story
- Proto-Indo-European*ser-?
- Proto-Indo-European*srew-
- Proto-Indo-European*sru-dʰ-mo-s
- Proto-Hellenic*hrutʰmós
- Ancient Greekῥῠθμός (rhŭthmós)
- Ancient Greekῥυθμικός (rhuthmikós)
- English todayrhythmic
From Ancient Greek ῥυθμικός (rhuthmikós), from ῥυθμός (rhuthmós, “measured flow or movement, symmetry, rhythm”) + -ικός (-ikós, suffix forming adjectives), equivalent to rhythm + -ic.
Etymology from Wiktionary, CC BY-SA 4.0.