Where does “antumbra” come from?

antumbra (English) comes from English ante, from Latin ante, from Ancient Greek κλίσις, from Ancient Greek -σῐς, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

antumbra (English): The region from which an occulting body appears...

Definitions

  1. The region from which an occulting body appears...

Ancestry of “antumbra”, step by step

antumbra traces back through two separate lines of ancestry.

via English ante

StepLanguageWordMeaning
1EnglishanteA price or cost, as in up the ante; In poker and...
2Latinantebefore, in front, forwards; before; before,...
3Ancient Greekκλίσιςbending, inclination; a lying down; a place for...
4Ancient Greek-σῐς"suffix forming nouns"
5Ancient Greek-τιςretained after dentals
6Proto-Indo-European-tisDerives abstract/action nouns from verb roots

via English umbra

StepLanguageWordMeaning
1EnglishumbraThe fully shaded inner region of a shadow cast by...
2Latinumbraa shadow; a shade; a ghost
3Old Latinomra
4Proto-Indo-Europeanh₂mr-u-
Every word from Proto-Indo-European -tisEvery word from Ancient Greek -σῐςEvery word from Ancient Greek κλίσις