- Fixed - Steadfast - Unalterable - Uncompromising - Incapable of being moved; firmly fixed; fast; -- used of
material things; as, an immovable foundatin. - Steadfast; fixed; unalterable; unchangeable; -- used of
the mind or will; as, an immovable purpose, or a man who remain
immovable. - Not capable of being affected or moved in feeling or by
sympathy; unimpressible; impassive.
- Impossible to shift - Never changing - Not subject to change - Unalterable - Unmodifiable - Not mutable; not capable or susceptible of change;
unchangeable; unalterable.
- Irreparable - Irrevocable - Permanent description of a vehicle that can’t back up? - Unalterable - Incapable of being reversed or turned about or back;
incapable of being made to run backward; as, an irreversible engine. - Incapable of being reversed, recalled, repealed, or
annulled; as, an irreversible sentence or decree.