IPA: /ˈjuːnɪnaɪz/
KK: /ˈjunɪˌnaɪz/
To organize workers into a union to protect their rights and interests.
The workers decided to unionise to negotiate better wages and working conditions.
Past: unionised
Past Participle: unionised
Unionise → It is formed from "uni-" (meaning one) and "-on" (from Latin "unio", meaning unity or oneness) and the suffix "-ise" (meaning to make or to become). The word "unionise" means to make or become one, particularly in the context of forming a union, especially among workers.
Think of 'one' ('uni-') coming together to create 'unity' — that's why unionise means to come together as one.