(finance) Acronym of financial independence and early retirement. / (economics, business) Acronym of finance, insurance and real estate: a class of businesses.

Being burned by fire. / (idiomatic) Achieving good results at a rapid rate. / (idiomatic) Sexually aroused.

(transitive) To set (something, often a building) on fire. / (transitive) To heat as with fire, but without setting on fire, as ceramic, metal objects, etc.

(slang) Amazing; excellent.

(military) Fire when ready. A command that allows troops to use weapons at their discretion and choose their own targets, allowing the individual soldier a greater freedom of timing the shot with target movement and similar.

heat and the flame produced when burning

present participle of fight fire with fire

simple past tense and past participle of fight fire with fire

Third-person singular simple present indicative form of fight fire with fire

(idiomatic) To respond to an attack with a similar or identical counter-attack (e.g. to respond to gunfire with reciprocal gunfire).