IPA: /ˌɪnsəˈrɛkʃənɪst/
KK: /ˌɪnsəˈrɛkʃənɪst/
A person who takes part in a rebellion against authority or government.
The insurrectionist was arrested for leading protests against the government.
Insurrectionist → It is formed from "in-" (meaning against) and "surgere" (meaning to rise). The word describes a person who rises against authority or government, typically in a rebellious manner.
Think of someone who is 'rising against' ('surgere') authority, which helps you remember that an insurrectionist is a person who rebels.