Where does “euthermic” come from?

euthermic (English) comes from English eu, from Ancient Greek εὖ, from Ancient Greek ἐΰς, from Proto-Hellenic ehu-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.

euthermic (English): Relating to, having, or producing an optimum...

Definitions

  1. Relating to, having, or producing an optimum...

Ancestry of “euthermic”, step by step

euthermic traces back through two separate lines of ancestry.

via English eu

StepLanguageWordMeaning
1Englisheu
2Ancient Greekεὖwell
3Ancient Greekἐΰςgood, brave, noble
4Proto-Hellenicehu-good
5Proto-Indo-Europeanh₁su-good
6Proto-Indo-Europeanh₁wes-good; to be cheerful, happy; to eat, to feast

via English thermic

StepLanguageWordMeaning
1EnglishthermicOf, related to, or associated with heat; thermal
Every word from Proto-Indo-European h₁wes-