Finnish word maalaus comes from Finnish -us, Finnish maalata (To score (to make a goal in a ballgame) To paint.)

Detailed word origin of maalaus

Dictionary entry	Language	Definition
-us	Finnish (fin)	Forms nouns from verbs, describing an action or event.. Forms nouns, indicating resemblance or association. Short form of the suffix -uus, used where the stem of the root adjective ends in a vowel.
maalata	Finnish (fin)	To score (to make a goal in a ballgame) To paint.
maalaus	Finnish (fin)	Painting (act of applying paint). Painting (work of art).

Words with the same origin as maalaus