( in short the cardinal directions are the main ones, North, South, East, and West. )

So the intermediate directions are the ones on the compass rose in between North, South, East, and West.

Southwest, Southeast, Northwest, Northeast

The points of the compass that fall between north and east, north and west, south and east, south and west (eg, NE, NW, SE, SW) are the intermediate directions.

An ordinal, or intercardinal, direction is one of the four intermediate compass directions located halfway between the cardinal directions.

Northeast (NE), 45°, halfway between north and east, is the opposite of southwest.

Southeast (SE), 135°, halfway between south and east, is the opposite of northwest.

Southwest (SW), 225°, halfway between south and west, is the opposite of northeast.

Northwest (NW), 315°, halfway between north and west, is the opposite of southeast.

They are in between the Cardinal Directions.

Cardinal Directions are N, S, E, W.

so, NW, SW, NE, SE