Finnish word perusoletus comes from Finnish oletus (Assumption, supposition.), Finnish perus-

Detailed word origin of perusoletus

Dictionary entry	Language	Definition
oletus	Finnish (fin)	Assumption, supposition.
perus-	Finnish (fin)	Basic, elemental, fundamental, rudimentary, normal, typical, average. Primal.
perusoletus	Finnish (fin)	Fundamental assumption, basic assumption. Principle (fundamental assumption).

Words with the same origin as perusoletus