undulate

"You can create the color orange by mixing yellow and red."

"Rivers flow from springs and lakes."

"His sudden appearance surprised me."

"The gentle motions of the swing lulled the baby to sleep. "

"My little sister collected seashells on the beach. "

"My grandmother is a fantastic storyteller; her stories about growing up on the farm always keep us entertained. "

"The hypnotist mesmerized the student, calming her anxiety before the presentation. "

"Go easy on him: he is but a child."

"The twins resemble each other."

"Quality of life is usually determined by health, education, and income."

"The tadpole changed into a frog.   Stock prices are constantly changing."

"The breeze undulated the curtains in the open window. "