This is the 15402nd most frequent Polish word.
sparzyć
"To scald" or "to burn (with hot liquid or steam)."
In this sentence, 'sparzyć' is used in a reflexive form, meaning to burn oneself accidentally by contacting something hot.
Nie dotykaj tej gorącej patelni, bo możesz się sparzyć.
Don't touch the hot pan, because you might burn yourself.
Here, 'sparzyć' is used in a transitive form to describe the action of pouring boiling water over tea leaves to prepare tea.
Sparzyłem herbatę wrzątkiem i zostawiłem ją do ostygnięcia.
I steeped (literally 'scalded') the tea with boiling water and left it to cool.
In this metaphorical use, 'sparzyć się' refers to experiencing regret or negative results due to a wrong choice or mistake.