IPA: /sɪˈsiːdər/
KK: /sɪˈsiːdər/
A person who withdraws from a group, organization, or country, often to form a separate entity.
The seceder left the political party to start a new movement.
Seceder → It is formed from "se-" (meaning apart) and "cedere" (meaning to go or yield). The word "seceder" refers to someone who goes apart or withdraws from a group or organization.
Think of someone who 'goes apart' ('se-') from a group — that's what a seceder does.