Undulate – To have a continuous up and down shape or movement, like a wave

PRONUNCIATION

(Pronounced un-due-late)

To remember the definition of the word undulate, use the following mnemonic:

He was unduly late (undulate) for his own wedding – he'd been up and down the road dozens of times looking for the ring that the best man had dropped.

Examples of undulate in a sentence

The dancers seemed to undulate like dolphins with the music. 

The roads in that region tended to undulate due to the hilly terrain.

The architect designed the roof so that it would undulate like a wave formation.