to move up and down or back and forth [v SEESAWED, SEESAWING, SEESAWS]
going up and down or back and forth
to move on or as if on a seesaw
contest or struggle in which now one side now the other has the lead
balanced plank on which two children ride up and down while seated at opposite ends
pastime in which two children or groups of children ride on opposite ends of a plank balanced in the middle so that one end goes up as the other goes down
an alternating up-and-down or backward-and-forward motion or movement