This is the 15646th most frequent Polish word.
suszy
"Suszy" means "dries" (third person singular of the verb "susić").
In this sentence, 'suszy' is the third person singular present form of the verb 'suszyć', meaning 'to dry'.
On suszy grzyby na strychu.
He is drying mushrooms in the attic.
Here, 'suszy' is used colloquially to describe the state of feeling thirst, especially after exertion.
Po treningu zawsze mnie mocno suszy.
After training, I always feel extremely thirsty.
In this example, 'suszy' refers to the natural process of soil drying due to heat or lack of precipitation, indicating a description of a physical state.