IPA: /kwɔːˈtɜːrnɪti/
KK: /kwɔːˈtɜrnɪti/
A group or set of four things or people, often used in contexts like theology or philosophy.
The quaternity represents the four elements of nature: earth, water, air, and fire.
Quaternity is formed from "quater" (from Latin "quater", meaning four times) and "-ity" (meaning the state or condition of). The word refers to the state of being four or a group of four.
Think of 'four times' ('quater') to remember that 'quaternity' means a group or state of four.