Anticlockwise, or counterclockwise is a circular direction around a central point, in the opposite direction to the way the hands on a clock turn. Anticlockwise goes towards the left.
Two things are beside each other if they are next to each other, facing the same direction. The two women on the bench are sitting beside each other, or side by side.
Corners are where two or more surfaces or lines meet, usually at right angles. A square has four corners, a cube has six, and a circle has none. The frogs are hiding in the corner of their tank.