This is the 5112th most frequent Polish word.
przeciwnie
"Przeciwnie" means "on the contrary" in English.
"Przeciwnie" is used in a sentence to highlight a positive attribute as opposed to a negative one.
Ona nigdy nie jest smutna; przeciwnie, zawsze jest pełna energii.
She is never sad; on the contrary, she is always full of energy.
"Przeciwnie" is used here to introduce a contrasting opinion to a previously stated idea.
Przeciwnie, uważam, że pomysł jest bardzo dobry.
On the contrary, I think the idea is very good.
"Przeciwnie" is used here to emphasize an action that is contrary to what might be expected.