Excommunicate, e.g.

BAN

Think of a short word for officially prohibiting someone from participating in a group or activity, often used in sports or online communities.

"Excommunicate, e.g." is a hint that the answer is a word meaning to formally exclude or prohibit. "Excommunicate" is a specific example of this action, often used in religious contexts to ban someone from a church. The answer "BAN" fits because it’s a general term for forbidding or shutting something out, making it a straightforward synonym-based clue. No wordplay here—just a direct definition.