Russian word восточный comes from Russian восто́к, Russian -ный

Detailed word origin of восточный

Dictionary entry	Language	Definition
восто́к	Russian (rus)
-ный	Russian (rus)	-ish, -ic, -al, -ed; having a particular quality of, pertaining to, associated with; forms adjectives from nouns, and sometimes from verbs.
восточный	Russian (rus)	East, eastern. Oriental.

Words with the same origin as восточный