n. [ Probably a reduplication of saw, to express the alternate motion to and fro, as in the act of sawing. ]
He has been arguing in a circle; there is thus a seesaw between the hypothesis and fact. Sir W. Hamilton. [ 1913 Webster ]
v. i.
v. t. To cause to move backward and forward in seesaw fashion. [ 1913 Webster ]
He seesaws himself to and fro. Ld. Lytton. [ 1913 Webster ]
a. Moving up and down, or to and fro; having a reciprocating motion. [ 1913 Webster ]