Forbidden by a standing decision. A ban is exclusion made permanent until reversed.

Prevented from acting, by condition or by design. Of a control switched off, or a body a world was not built for.

The file that names what the record leaves out — exclusion declared once, honored everywhere.

Refusal, or absence. The shortest complete sentence, and a full answer on its own.

Existing but not reachable now. Unavailable is not absent, and confusing the two is a common error.