Italian word tratto comes from Proto-Indo-European *tragʰ-, and later Latin tractus (Drawing, dragging, hauling, pulling.)

Detailed word origin of tratto

Dictionary entry	Language	Definition
*tragʰ-	Proto-Indo-European (ine-pro)	to draw, drag
traho	Latin (lat)	(by extension) I attract the support of, win over.. (figuratively) I attract, draw (someone; their attention). I drag.. I draw out, prolong.. I extract, withdraw.. I plunder, squander.. I trail.
tractus	Latin (lat)	Drawing, dragging, hauling, pulling.
tratto	Italian (ita)	(followed by da) taken (from), based (on) (anatomy) tract. (chiefly, in the plural) feature, lineament. (chiefly, in the plural) feature, trait, characteristic. Part, section, piece. Plot. Stretch (of road, river etc). Stroke, line (of a pen etc). Time, period.

Words with the same origin as tratto