prostým

prostým is the instrumental singular form of the Czech adjective prostý, which translates roughly as "simple," "plain," or "ordinary." It is used to express manner or means in phrases such as prostým způsobem, meaning "in a simple way," or to describe an instrument or actor in instrumental case, for example prostým člověkem (by/with a plain, ordinary person).

In use, prostým often conveys a sense of lack of ornament, complexity, or pretension, and can carry neutral, favorable, or mildly pejorative connotations depending on context. It is common in both everyday language and more formal, descriptive prose when contrasting simplicity with elaboration or sophistication.

Grammatically, prostým is the masculine singular instrumental form of prostý. Adjectival agreement means the feminine instrumental singular is prostou, and the neuter instrumental singular is prostým. The form changes in plural as well, paralleling the adjectives' inflection patterns in Czech.

Etymologically, prostý derives from Proto-Slavic meaning “plain” or “straightforward,” and its usage has retained that sense across Czech, including in expressions that emphasize humility, frugality, or unadorned truth, as in religious or social contexts. The word encompasses a broad range of nuance from neutral description to cultural associations with plainness and authenticity.

See also: prostý, Czech grammar, Czech adjectives, instrumental case.