IPA: /sɪˈkɛʃən/
KK: /sɪˈkɛʃən/
The act of formally leaving or withdrawing from a group, organization, or political entity.
The state's secession from the union was a significant event in American history.
Secession is formed from "se-" (meaning apart) and "cedere" (meaning to go or yield). The word describes the act of going apart or withdrawing from a group or organization.
Think of 'going apart' ('se-') from a group or organization, which is what secession means.