Where does “antitangent” come from?

antitangent (English) comes from English tangent, from Latin tangentem, from Latin tangens, from Latin tangō, from Proto-Italic *tangō, from Proto-Indo-European denḱ- — to bite.

Ancestry of “antitangent”, step by step

antitangent traces back through two separate lines of ancestry.

via English tangent

StepLanguageWordMeaning
1EnglishtangentA straight line touching a curve at a single...
2Latintangentemaccusative masculine singular of tangēns;...
3Latintangenstouching, grasping; reaching, arriving at;...
4Latintangōto touch, grasp
5Proto-Italic*tangō
6Proto-Indo-Europeandenḱ-to bite

via English anti

StepLanguageWordMeaning
1EnglishantiOpposed to something; That has a torsion angle...
2Englishanti-Against, hostile to; Contrasting with the norm;...
3Ancient Greekἀντι-anti-, against; like, reminiscent of
4Ancient Greekᾰ̓ντῐ́opposite
Every word from Proto-Indo-European denḱ-