unspeakable

Beyond description; inexpressible.

Inexpressibly bad or objectionable.

Not to be spoken.

Not able to speak.

Incapable of being spoken or uttered; unutterable; ineffable; inexpressible.

Extreme; extremely bad: as, an unspeakable fool; an unspeakable play.

Not speakable; incapable of being uttered or adequately described; inexpressible; unutterable; ineffable.

Incapable of being spoken or uttered; unutterable; ineffable; inexpressible.

Unfit or not permitted to be spoken or described.

Extremely bad or objectionable.