(~s, ~ing, ~ed)
1.
Teeter is used in expressions such as ~ on the brink and ~ on the edge to emphasize that something seems to be in a very unstable situation or position.
Three of the hotels are in receivership, and others are ~ing on the brink of bankruptcy...
His voice ~ed on the edge of hysteria.
VERB: V on n, V on n emphasis
2.
If someone or something ~s, they shake in an unsteady way, and seem to be about to lose their balance and fall over.
Hyde shifted his weight and felt himself ~ forward, beginning to overbalance...
VERB: V adv/prep