fluctuate

Borrowed from Latin fluctuo, fluctuatus.

fluctuate (third-person singular simple present fluctuates, present participle fluctuating, simple past and past participle fluctuated)

1. (intransitive) To vary irregularly; to swing.
2. (intransitive) To undulate. (Can we add an example for this sense?)
3. (intransitive) To be irresolute; to waver.

   I fluctuated between wishing he was back home and wishing I'd never met him.

4. (transitive) To cause to vary irregularly.

• fluctuant

fluctuāte

1. second-person plural present active imperative of fluctuō