homologous

The story

1. Proto-Indo-European*sem-
2. Proto-Indo-European*somHós
3. Proto-Hellenic*homós
4. Ancient Greekὁμός (homós)
5. Proto-Indo-European*leǵ-
6. Proto-Indo-European*lóǵos
7. Proto-Hellenic*lógos
8. Ancient Greekλόγος (lógos)
9. Ancient Greekὁμόλογος (homólogos)
10. Late Latinhomologus
11. English todayhomologous

From Late Latin homologus, from Ancient Greek ὁμόλογος (homólogos, “agreeing, of one mind”), from ὁμός (homós, “same”) + λόγος (lógos, “reason, reckoning”). Compare homo- (“same”) and -ous (adjectival suffix). From 1655, in the mathematical sense. See also homolog, homologue.

Words from the same roots