Something that is unacceptable or can not be permitted to happen. If my advice is inadmissible, you couldn't use it.
The prefix of the word "inadmissible" is "in-," which means "not" or "without." In this case, "inadmissible" means not able to be accepted or allowed.
Inadmissible.
Some evidence is inadmissible in a court of law.
Inadmissible Evidence - film - was created in 1968.
Inadmissible expenses are expense not allowed for deducting from some figure for arriving on some acceptable figure e.g for taxation purposes depreciation is an inadmissible expense.
inadmissible
Inadmissible Evidence - 1968 is rated/received certificates of: UK:AA USA:Approved (Suggested for Mature Audiences)
Inadmissible Evidence - 1968 was released on: USA: 23 June 1968 (New York City, New York)
Hearsay is not evidence, the court rules will not allow it to be heard. As you have stated in your question it is, by definition, INADMISSIBLE.
The dictator used coercion to force the citizens to comply with his oppressive regime.
Admissible as evidence
Electronic or digital evidence is often inadmissible if it was obtained without any authorization whatsoever. Without a warrant even solid evidence can be rendered useless.