IPA: /kənˈɡrɛʃənl/
KK: /kənˈɡrɛʃənl/
Relating to a formal meeting or assembly, especially one that involves a legislative body like Congress.
The congressional committee met to discuss new laws.
Congressional → It is formed from "con-" (meaning together) and "gressus" (from "gradi", meaning to step or to walk). The word "congressional" refers to something related to a gathering or assembly of representatives stepping together to discuss or legislate.
Think of representatives coming together ('con-') to 'step' ('gressus') into discussions or decisions — that's what congressional means.