Refractory

"Refractory" in bg

непокорен

nepokoren

(obstinate; strongly opposed)

непослушен

neposlušen

(obstinate; strongly opposed)

огнеупорен

ogneuporen

(not affected by great heat)

трудно лечим

trudno lečim

(medicine: difficult to heal)

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.