Italian word insalata comes from Latin salem, and later Latin salire ((jump, spring). (salt, sprinkle).)

Detailed word origin of insalata

Dictionary entry	Language	Definition
salem	Latin (lat)
salire	Latin (lat)	(jump, spring). (salt, sprinkle).
*insalare	Vulgar Latin (la-vul)
*salare	Latin (lat)
*insalāre	Vulgar Latin (la-vul)
insalare	Italian (ita)	To become saline (of a river as it approaches the sea). To season (food) with salt.
insalato	Italian (ita)
insalata	Italian (ita)	Lettuce. Salad.