nápln

Náplň is a Czech and Slovak feminine noun derived from the verb plnit (to fill). It has several related senses that are widely used in everyday language and specialized contexts.

In cooking, náplň refers to the filling or stuffing used inside pastries, dumplings, meat dishes and other prepared foods. It can be sweet or savory, such as an apple náplň for koláč or a meat-based náplň for závitky. The term also describes the inner content of a dish or product more generally.

In a broader sense, náplň means content, substance, or scope. It is used to describe what a program, course, presentation, or job consists of, as in náplň programu, náplň kurzu, or náplň práce.

In everyday objects, náplň denotes a replacement component or cartridge. Common phrases include náplň do pera (pen refill) and náplň do tiskárny (ink or toner cartridge). This sense emphasizes a part that is consumed and needs replacement.

Etymology traces to the verb plnit with the prefix ná-, a pattern common in Czech and Slovak. The word is neutral and widely understood across both languages, with the exact meaning determined by context.