Latin word alto comes from Latin adoleo, Latin -one(-onem|m)

Detailed word origin of alto

Dictionary entry	Language	Definition
adoleo	Latin (lat)	I emit an odor, smell. I consume or destroy by fire, burn.. I magnify or pile up with for sacrifice; burn, sacrifice.
-one(-onem|m)	Latin (lat)
alto	Latin (lat)	I make high, raise, elevate.