Where does “attingency” come from?

attingency (English) comes from English attingence, from English attingent, from Latin attingens, from Latin attingō, from Latin tangō, from Proto-Italic *tangō, from Proto-Indo-European denḱ- — to bite.

Ancestry of “attingency”, step by step

StepLanguageWordMeaning
1EnglishattingenceThe property of being attingent; adjacency
2Englishattingenttouching; adjacent
3Latinattingenstouching
4Latinattingōto come in contact with, touch
5Latintangōto touch, grasp
6Proto-Italic*tangō—
7Proto-Indo-Europeandenḱ-to bite
Every word from Proto-Indo-European denḱ- →Every word from Proto-Italic *tangō →Every word from Latin tangō →