1 (fixed) strong and steady: a firm handshake.
az: sərt, möhkəm
ru: крепкий
2 decided; not changing one's mind: a firm refusal.
az: kəskin
ru: твёрдый, непоколебимый
See also:
firm2 [fəːm] noun
a business company: an engineering firm.
az: şirkət, firma
ru: фирма