I. ˈtē-tər intransitive verb
Etymology: Middle English titeren to totter, reel; akin to Old High German zittarōn to shiver
Date: 1844
1.
a. : to move unsteadily : wobble
b. : waver , vacillate
teeter ed on the brink of bankruptcy
2. : seesaw
II. noun
Date: 1860
: seesaw 2b