prezidentskou
"Prezidentskou" is a Czech feminine adjective meaning "presidential." It is used to describe things related to the president or the office of the president. For example, one might speak of the "prezidentskou kancelář" (presidential office) or "prezidentskou návštěvu" (presidential visit). The masculine form is "prezidentský" and the neuter form is "prezidentské."
The term's usage is primarily within the Czech Republic, where the president is the head of state.