IPA: /kəˈnɛkʃən/
KK: /kəˈnɛkʃən/
A way in which two or more things are related or linked together, often used in British English as a variant spelling of another word.
The connexion between the two theories is quite strong.
**Connexion** → It is formed from "con-" (meaning together) and "nexio" (from Latin, meaning to bind or tie). The word "connexion" refers to the act of binding or linking things together.
Think of things being 'tied together' ('nexio') and 'with' ('con-') — that's why connexion means a link or relationship.