Latin word insulo comes from Latin salum

Detailed word origin of insulo

Dictionary entry	Language	Definition
salum	Latin (lat)	(figuratively) sea of thought, anxiety, agitation or trouble. (figuratively) the colour of the sea. (figuratively, of a river) stream, current. The (open or high) sea, main, deep, ocean. The sea in motion; waves, billow.
insula	Latin (lat)	Island. Residential or apartment block (usually for the lower class).
insulo	Latin (lat)	I make into an island.