The story
- Proto-Indo-European*gʷeyh₃-
- Ancient Greekβῐ́ος (bĭ́os)
- Ancient Greekβῐο- (bĭo-)
- Englishbio-
- Proto-Indo-European*ser-?
- Proto-Indo-European*srew-
- Proto-Indo-European*sru-dʰ-mo-s
- Proto-Hellenic*hrutʰmós
- Ancient Greekῥῠθμός (rhŭthmós)
- Latinrhythmus
- Englishrhythm
- Englishbiorhythm
- Englishbiorhythmic
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- English todaybiorhythmically
From biorhythmic + -ally.
Etymology from Wiktionary, CC BY-SA 4.0.