This is the 63rd most frequent Slovak word.
piatok
"Friday"
The word 'piatok' is used here as a noun to denote the day 'Friday', which is a proper noun in the context of days of the week.
Piatok je môj obľúbený deň v týždni.
Friday is my favorite day of the week.
In this sentence, 'piatok' is used in the singular nominative case, combined with the quantifier 'každý' (every), to describe a recurring activity on Fridays.
Každý piatok chodíme do kina s priateľmi.
Every Friday we go to the cinema with friends.
Here, 'piatok' denotes specificity by associating it with the determiner 'tento' meaning 'this', to indicate a specific Friday in the context of future plans or events.