Finnish word narkkis comes from Finnish -is, Finnish narkomaani

Detailed word origin of narkkis

Dictionary entry	Language	Definition
-is	Finnish (fin)	(colloquial) -er; a suffix used to form nouns and proper nouns from place names, common nouns and adjectives; gives a familiar nuance to the original word; the original word is often truncated in the process.
narkomaani	Finnish (fin)	A drug addict. Sometimes used of other kinds of addictions, especially as an element in compound words.
narkkis	Finnish (fin)	(slang) junkie.

Words with the same origin as narkkis