This is the 4846th most frequent Polish word.
opuścił
"Left" or "abandoned."
The word 'opuścił' means 'left' in this sentence, and it is used in the context of someone physically leaving a place.
Janek opuścił szkołę wcześniej.
Janek left school earlier.
Here, 'opuściła' is used to mean 'missed,' implying that Marysia did not attend the classes present.
Marysia opuściła zajęcia z powodu choroby.
Marysia missed classes due to illness.
In this usage, 'opuścił' means 'lowered,' referring to an action of moving something downward physically.