/ˈtɾɛ.du/, /ˈtɾɛ.du/, /ˈtɾɛ.do/
OrigemFrom Latin trāditor (“betrayer”) via the nominative, subsequently repurposed as an adjective. An older form was tredro.
Formastreda(feminine) · tredos(masculine, plural) · tredas(feminine, plural)
Fonte: Wikcionário