Italian word tranquillo comes from Proto-Italic *trānskʷīlos

Detailed word origin of tranquillo

Dictionary entry	Language	Definition
*trānskʷīlos	Proto-Italic (itc-pro)
tranquillus	Latin (lat)	(of a person) placid, composed, untroubled, undisturbed. (of the weather or similar) quiet, calm, still, tranquil.
tranquillo	Italian (ita)	Calm, sober, tranquil.

Words with the same origin as tranquillo