Immissible

Immissible is an adjective that denotes not permissible or not allowed. In modern English, it is extremely rare and is generally considered archaic or nonstandard. Contemporary writers typically use impermissible or inadmissible to convey the intended sense. Because immissible is uncommon, most dictionaries treat it as a historical or dialectal form rather than a standard term.

Etymology and attestations are sparse. The form appears to be a negated variant related to the same root as admissible, but the precise historical development is uncertain. In practice, immissible appears primarily in older legal, scholastic, or formal texts, where it may have been used where today one would write inadmissible or impermissible.

Usage notes and comparisons:

- Impermissible commonly means not allowed or not permitted, often in a general sense.

- Inadmissible usually refers to something that cannot be admitted as evidence or considered in a decision.

- Admissible and permissible are the affirmative opposites.

Because immissible is not standard in contemporary usage, it is best avoided in modern writing in favor of impermissible or inadmissible. When encountered in older documents, it should be interpreted as meaning not allowed or not admissible, depending on context.

See also:

- Impermissible

- Inadmissible

- Admissible

- Permissible

- Immiscible (unrelated chemistrily, meaning not able to be mixed)