1) Balanced on the brink 2) Balanced precariously 3) Barely balanced 4) Could have gone either way 5) Did not move decisively 6) Enjoyed the playground 7) Evinced instability 8) Moved as if well-oiled 9) Moved unsteadily 10) Prepared to collapse 11) Rocked on the brink 12) Seesawed 13) Showed imbalance 1) Reeled 2) Seesawed 
• (imp. & p. p.) of Teeter