Irrefragable

"Irrefragable" in Russian

бесспо́рный

besspórnyj

(which cannot be refuted — see also indisputable, irrefutable)

неопровержи́мый

neoproveržímyj

(which cannot be refuted — see also indisputable, irrefutable)

неоспори́мый

neosporímyj

(which cannot be refuted — see also indisputable, irrefutable)

Next best steps

Mini challenge

Unscramble this word: irrefragable