seesawed

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：teeterteeter-totterteetertotterteeterboardtilting boarddandle board

v.

ride on a plank

同义词：teeter-totterteetertotter

move up and down as if on a seesaw

move unsteadily, with a rocking motion

同义词：teetertotter

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