sütü

Sítí is the instrumental singular form of the Czech noun síť, which means both a net used for catching and a network or mesh. The word síť is a common term in Czech for physical nets as well as for systems of connected elements, such as computer networks, transportation networks, or social networks. Because síť has multiple senses, sítí can appear in a variety of contexts where the noun is used as the means or instrument of an action.

Etymology and cognates: The Czech síť belongs to the West Slavic family and has cognates in neighboring languages, such as Polish sieć and Slovak sieť, all sharing the core sense of a connected or net-like structure. The sense evolution from a literal fishing net to broader figurative meanings (networks, grids, systems) is common in many languages and reflects the same underlying image of interlinked parts.

Grammar and usage: Sítí functions as the instrumental form, indicating the means or instrument of an action in sentences where the noun síť is the referent. It appears in grammatical constructions governed by instrumental case, and its exact role depends on the surrounding verb or preposition. In modern Czech, síťs and related forms appear across ordinary speech and specialized terminology without altering the fundamental meaning of síť.

Meanings and applications: In everyday language, síť covers fishing nets and meshwork. In contemporary usage, it also designates networks in technology (počítačová síť), telecommunications, social platforms (sociální sítě), and infrastructure networks. The instrumental form sítí is thus a grammatical device, while the base noun síť remains the principal lexical item.

See also: síť (network), Wikipedia-style linguistic entries on Czech noun declensions.