0 past simple and past participle of seesaw
1 to change repeatedly from one emotion, situation, etc. to another and then back again:
This meant she frequently seesawed between debit and credit hours and had to keep a time balance sheet and make adjustments to meet her employment obligation.
For the next year, possession of the city seesawed.
The bilateral relations have seesawed over the last century and a half between normal trade relations and serious tension over ideology and finance.
Empirical and theoretical work on bipolar disorder has throughout history seesawed between psychological and biological ways of understanding.
Power seesawed back and forth, 1931-36 as the monarchy was overthrown, and complex coalitions formed and fell apart.