pírodními
Přírodními is the instrumental plural form of the Czech adjective přírodní, meaning natural. It is used to modify nouns in the instrumental case and describes something related to nature or occurring in nature.
In usage, this form appears in phrases that indicate being accompanied by or related to natural aspects.
Etymology and spelling notes: the adjective přírodní is derived from příroda, meaning nature. The standard spelling
In practice, the correct form is přírodními. A variant without the háček, pírodními, is not correct in