TEETER

[tee.ter] vi [ME titeren to totter, reel; akin to OHG zittaron to shiver] (1844) 1 a: to move unsteadily: wobble b: waver, vacillate "a passive type who ~s between conformity and revolt --R. N. Denney"

2: seesaw

[2]teeter n (1863): seesaw 2b