Undulate

- Move or go with an smooth up and down motion.
- having a smoothly rising and falling form or outline or a wave like motion. (undulated or undulating)

Example: As an Adjective
- an undulating surface.
- his undulating dance performance.

Synonyms: wave, surge, billow, roll, ripple, heave, flow, wind, swing, whirl, wobble, oscillate

Antonyms: Straight