This is the 510th most frequent Ukrainian word.
минулу
"Минулу" in English means "past" (feminine form, e.g., "past time" or "past event").
In this sentence, "минулу" is an adjective modifying "суботу" (Saturday), indicating the past week.
Минулу суботу ми провели на природі.
Last Saturday, we spent time outdoors.
Here, "минулу" describes "зміну" (shift), specifying the prior one in time.
На минулу зміну залишилося багато роботи.
There was a lot of work left for the previous shift.
The word "минулу" is used to describe "епоху" (era), referring to a time that has elapsed.