borkinja

1. (in sport or war) female fighter
   Naša borkinja je pobedila već u prvoj rundi. — Our fighter won in the very first round.
   Postala je profesionalna MMA borkinja. — She became a professional MMA fighter.
2. (+ za + acc.) campaigner; champion
   Bila je borkinja za prava žena. — She was a campaigner for women's rights.
3. (of character) fighter; strong woman
   Moja baka je prava borkinja. — My grandma is a real fighter.

In Serbia borac is also often used of women.