to unduly meddle and/or interfere in politics (action restricted to Alfonso XIII and, by extension, other Spanish Bourbon monarchs), often with the result of the fall from grace of a politician.
edge, border, brink, verge, rim, margin; brim, rim, lip (top edge of a vessel or container); side (of the road, highway, freeway, etc.); ledge (of a window); edging, fringe (shaping or dressing the edge of something)