Finnish word onnellinen comes from Finnish onni (Happiness. Luck.), Finnish -llinen

Detailed word origin of onnellinen

Dictionary entry	Language	Definition
onni	Finnish (fin)	Happiness. Luck.
-llinen	Finnish (fin)	Forms adjectives that indicate likeness.. Forms adjectives that indicate possession or relationship.. Forms adjectives that indicate time.. Forms nouns that define a person through his characteristics or possessions.. Forms nouns that indicate an amount.
onnellinen	Finnish (fin)	Happy.

Words with the same origin as onnellinen