písemnou
Písemnou is the feminine instrumental singular form of the Czech adjective písemný, meaning written or documented. It is used to describe something that is expressed in writing or conveyed by written means. The form appears in phrases that indicate the manner or medium of communication, such as written documents, statements, or forms.
Etymology and grammar: The adjective písemný derives from the noun písmo (writing, script) with the adjectival
Usage: Písemnou is widely used in formal, legal, and administrative language to specify the written modality
Relation to other forms: The masculine form is písemný, the neuter is písemné, and the feminine nominative
See also: Czech grammar, adjectives, written communication, formality in Czech.