impropria
Impropia is a Latin term formed as the feminine singular of the adjective improprius, meaning not proper, improper, or inappropriate. The adjective is used in classical and medieval Latin to describe actions, things, or situations that do not conform to the norms of propriety or proprium. Because Latin adjectives agree with the nouns they modify, impropria can appear in different syntactic forms depending on gender and number; for example, feminine singular is impropria, feminine plural is impropriae, masculine singular is improprius, neuter plural is impropria, and so on.
In Latin grammar, improprius and its inflected forms are employed to convey judgments about propriety or suitability
In modern linguistic and philological work, impropria is primarily encountered as an inflected form of an adjective
See also: improprius, proprius, Latin grammar, Latin adjectives.