Can the word seesaw be used as a verb?

Yes, "seesaw" can be used as a verb. It means to move up and down alternately, like a seesaw.

Here are some examples:

* "The children seesawed on the playground."

* "The stock market seesawed between gains and losses."

* "Her emotions seesawed between hope and despair."

However, it's not as common a verb as "seesaw" as a noun. It's often used figuratively to describe something that fluctuates or alternates between two states.