absolutist.

absolutt + -ist, first part from Latin absolūtus (“concluded, absolute”), perfect passive participle of absolvō (“complete, finish”), from both ab- (“from, off, away from”), from Latin ab (“from, away from, on, in”), from Proto-Italic *ab, from Proto-Indo-European *h₂epó (“off, away”) + and from solvō (“release, loosen, dissolve, take apart”), from both sē- (“apart-, aside-, away”), from Proto-Indo-European *s(w)ēd, the ablative singular of *s(w)é (“self”) + and from luō (“to untie, set free, separate”), from Proto-Indo-European *lewh₃- (“to wash”). Last part from French -iste (“-ist, -istic”), from Latin -ista (“-ist; one who practises or believes”), from Ancient Greek -ιστής (-istḗs), alternative form of -τής (-tḗs), from Proto-Hellenic *-tās, probably from Proto-Indo-European *-teh₂ (forms nouns representing state of being).