on, for, or belonging to, the side of the body that in most people has the less skilful hand
Go straight and turn left at the corner.
right
on or related to the side of the body which in most people has the more skilful hand, or to the side of a person or thing which is toward the east when that person or thing is facing north (opposite to left)
You should make it right at this street.
cross
to go from one side of something to the other side
Be careful when you cross that slippery road by the store.