Finnish word vaarallinen comes from Finnish vaara, Finnish -llinen

Detailed word origin of vaarallinen

Dictionary entry	Language	Definition
vaara	Finnish (fin)	Danger, risk, peril, hazard, jeopardy. A large, forested hill (as opposed to fell).
-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.
vaarallinen	Finnish (fin)	Dangerous.

Words with the same origin as vaarallinen