Finnish word blosis comes from Swedish blåsa, Finnish -is

Detailed word origin of blosis

Dictionary entry	Language	Definition
blåsa	Swedish (swe)	(colloquial) to fool, diddle, hoodwink. (music) to play (a wind instrument). To blow; to be propelled by, or to propel by, an air current. To blow; to create or shape by blowing; as in blåsa bubblor (blow bubbles), blåsa glas (blow glass). To blow; to produce an air current (anatomy) a bladder, a vesica. (colloquial) a party dress. (medicine) a blister, a bulla. A bleb, a bubble.
-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.
blosis	Finnish (fin)	(Helsinki slang) wind (movement of air).

Words with the same origin as blosis