Compound word (adjective): (Literally) oven-fresh. (Figuratively) brand-new, just completed, hot off the press etc.
Uuni is a noun that means ”oven,” ”stove,” ”kiln” or ”furnace.”
Tuore is an adjective meaning ”new,” ”fresh,” ”recent” or ”up to date.”
The hyphen (-) appears in the word on this package only to indicate it should be one complete word but happens to be split between two lines.