undulating

These models suggest that the animal propelled itself through the water by paddling with its front legs and moving its tail in an undulating motion.

From Science Daily ● Oct. 13, 2026

Then Curry, undulating ever so slightly, delivers his first lines in a cavernous register, seated someplace between a purr and a growl.

From Salon ● Aug. 26, 2026

Seen from below, the table’s ebonized-birch legs also suggest, by turns, two figures kissing, ancient post-and-lintel architecture, an undulating serpent and a recumbent figure by Henry Moore.

From The Wall Street Journal ● Jul. 1, 2026

McIlroy says he does not feel pain while hitting shots but the 7,394 yard Aronimink is a demanding and undulating walk.

From BBC ● May 13, 2026

We seemed to be driving aimlessly, riding up and down over the undulating land, like a ship adrift in the waves.

From "Killers of the Flower Moon" by David Grann