IPA: /ˈkɒlənaɪzər/
KK: /ˈkɒlənaɪzər/
A person who goes to live in a new area or country, often to establish control over it and its people.
The colonizer brought new customs and ideas to the land they settled in.
Colonizer → It is formed from "colon" (from Latin "colonia", meaning a settlement or farm) and "-izer" (a suffix used to indicate a person who performs a specific action). The word "colonizer" refers to a person who establishes a settlement in a new territory.
Think of a 'settlement' ('colon') and someone who 'creates' that settlement ('-izer'). A colonizer is someone who establishes a new place to live.