сечениеsectio [onis, f];
разграничениеterminatio [onis, f]
границаfinis [is, m];
rubescere, o, bui, -; erubescere; irrubescere; rubзre [e]o, ui, -; erubзre; irrubзre; russescere, o, -,-; ruborem contrahere, o, xi, ctum / induere, o, ui, utum;