Synonyms:
- inalienable,
- incommunicable,
- indefeasible,
- indefinable,
- indescribable,
- ineffable,
- inenarrable,
- inexpressible,
- innominable,
- noncontagious,
- noninfectious,
- undefinable,
- unimpartable,
- unmentionable,
- unnameable,
- unspeakable,
- unutterable,
- unwhisperable