- 2Significado: positionboundary extremity frontier confine limitend outpost periphery border
- 3Significado: borderboundary limit hinterland outskirts frontier
- 4Significado: new field of learningcutting edge breakthrough frontier
- 5Significado: perimeteredge borderline borderperiphery frontier fringe
- 6Significado: limitborder limitation confine boundend extent frontier boundary