IPA: /ˈjuːniən/
KK: /ˈjunɪn/
Relating to a group formed for a common purpose, especially in the context of labor or political organization.
The union workers negotiated better wages and working conditions.
A group or organization formed by joining together different people, parties, or entities for a common purpose or benefit.
The labor union fought for better wages and working conditions for its members.
Union → It is formed from "un-" (meaning one) and "io" (from Latin "unio", meaning unity or oneness). The word "union" refers to the state of being one or joined together.
Think of 'one' ('un-') coming together in 'unity' ('io') — that's why union means a coming together as one.