IPA: /ˌɪnsəˈrɛkʃənl/
KK: /ˌɪnsəˈrɛkʃənl/
Relating to a rebellion or uprising against authority, especially a government.
The insurrectional movements in the country aimed to challenge the existing regime.
Insurrectional is formed from "in-" (meaning not or into) and "surgere" (meaning to rise). The word describes something related to a rising up against authority or government, hence the term insurrection.
Think of 'rising up' ('surgere') against something 'not' ('in-') accepted — that's what insurrectional refers to.