This is the 175th most frequent Czech word.
trhu
The Czech word "trhu" means "market" (genitive or dative singular, or accusative singular of "trh").
Here, 'trhu' is used to indicate the locative case of the noun 'trh' (market), showing location.
Na trhu jsem si koupil čerstvou zeleninu.
At the market, I bought fresh vegetables.
In this sentence, 'trhu' is used as the destination in the accusative case, referring to the reaching of the market in an economic context.
Po vstupu na trhu se naše akcie zvýšily.
After entering the market, our stocks rose.
Here, 'trhu' is used in its plural genitive case form to denote possession or relation to 'markets'.