German word utilitaristisch comes from German -isch, German Utilitarist

Detailed word origin of utilitaristisch

Dictionary entry	Language	Definition
-isch	German (deu)	An adjectival suffix, often matching -ic and -ical. Of a nationality, or the language associated with a nationality; often matches -ish or -ian.
Utilitarist	German (deu)
utilitaristisch	German (deu)	Utilitarian.