Where does “wax poetic” come from?

wax poetic (English) comes from English poetic, from Middle French poetique, from Latin poeticus, from Ancient Greek ποιητικός, from Ancient Greek -τικός, from Ancient Greek -σις, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

wax poetic (English): To become increasingly verbose; To speak in an...

Definitions

  1. To become increasingly verbose; To speak in an...

Ancestry of “wax poetic”, step by step

wax poetic traces back through two separate lines of ancestry.

via English poetic

StepLanguageWordMeaning
1EnglishpoeticRelating to poetry; Characteristic of poets;...
2Middle Frenchpoetique
3Latinpoeticuspoetic
4Ancient Greekποιητικόςcreator; making, producing
5Ancient Greek-τικόςrelating to, suited to, skilled in, able to,...
6Ancient Greek-σιςAdded to verb stems to form abstract nouns or...
7Ancient Greek-τιςretained after dentals
8Proto-Indo-European-tisDerives abstract/action nouns from verb roots

via English wax

StepLanguageWordMeaning
1EnglishwaxBeeswax; Earwax; Any oily, water-resistant...
2Middle Englishwaxwax beeswax, sealing wax, etc
3Old Englishweaxwax
4Proto-West Germanicwahs
5Proto-Germanicwahsąwax
6Proto-Indo-Europeanwoḱ-so-
Every word from Proto-Indo-European -tisEvery word from Ancient Greek -τικόςEvery word from Ancient Greek ποιητικός