fight fire with fire in Finnish
fight fire with fire in Finnish
panna kova kovaa vastaan
(idiomatic) To respond to an attack with a similar or identical counter-attack (e.g. to respond to gunfire with reciprocal gunfire).
taistella tulella tulta vastaan
(idiomatic) To respond to an attack with a similar or identical counter-attack (e.g. to respond to gunfire with reciprocal gunfire).