Synonym of undocumented immigrant
Lacking instructions or reference material.
Not having official documentation required to legally enter, reside in, or work in a country.
Not having official documents that provide identification, authorization, etc.
Something which is unutterable (incapable of being physically spoken, incapable of being articulated or expressed, etc.).
Not utterable; incapable of being physically spoken or voiced; unpronounceable.
Not allowed to be spoken; taboo, unspeakable.
Incapable of being articulated or expressed; indescribable, inexpressible.
Extremely bad or objectionable; unspeakable.