n.a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end
同义词:seesawteeterteeter-totterteetertotterteeterboardtilting boarddandle board
v.
ride on a plank
同义词:teeter-totterteetertotterseesaw
move up and down as if on a seesaw
同义词:seesaw
move unsteadily, with a rocking motion
同义词:teeterseesawtotter