prstu

Prstu is the genitive singular form of the Czech noun prst, which means finger. In Czech, prst is a masculine inanimate noun, and prstu is its genitive singular form. This form is used in constructions that require a genitive, most notably in noun phrases describing possession or relation, such as délka prstu (the length of the finger) or konec prstu (the fingertip).

The word prst derives from Proto-Slavic and has cognates in related Slavic languages, for example Slovak prst. The Czech form prstu fits into this family as the standard genitive singular of the word for finger. The language uses this form in various genitive constructions, as well as in compound phrases and measurements involving a finger.

In everyday usage, prst refers to a finger on the hand, and related terms cover different anatomical or descriptive contexts, such as the parts and positions of fingers or measurements tied to a finger. The plural nominative form is prsty, and the word appears in both spoken and written Czech across a range of topics from anatomy to everyday description.