quaternity

Etymology tree Proto-Indo-European *kʷetwóresder. Latin quater Latin -nus Latin quaternus Proto-Indo-European *-teh₂ Proto-Indo-European *-ts Proto-Indo-European *-teh₂ts Proto-Italic *-tāts Latin -tās Late Latin quaternitāslbor. Old French quaternité Middle French quaternitélbor. ▲ Late Latin quaternitāslbor. English quaternity Learned borrowing from Middle French quaternité (“set of four things; (Christianity) dogma that there are four persons in the Godhead”), from Old French quaternité (modern French quaternité); and from their etymon Late Latin quaternitās (“set of four things; (Christianity) group of four persons in the Godhead”) (modelled after trīnitās (“triad; (Christianity) the Trinity”)) + English -ity (suffix forming abstract nouns). Quaternitās is derived from Latin quaternī + -tās (suffix forming abstract nouns denoting states of being); and quaternī is an inflection of quaternus (“four at a time; fourfold”), from quater (“four times”) (from Proto-Indo-European *kʷetwóres (“four”)) + -nus (suffix forming distributive numerals). By surface analysis, quatern + -ity.

1. 01
   derived from *kʷetwóres✻ — “four”
2. 02
   derived from quaternī
3. 03
   learned borrowing from quaternitās — “set of four things; (Christianity) group of four persons in the Godhead”
4. 04
   derived from quaternité
5. 05
   learned borrowing from quaternité — “set of four things; (Christianity) dogma that there are four persons in the Godhead”