undulate

verbs

stir up (water) so as to form ripples

cockle, riffle, ripple, ruffle, undulate

occur in soft rounded shapes

"The hills rolled past"

roll, undulate

move in a wavy pattern or with a rising and falling motion

"The curtains undulated"; "the waves rolled towards the beach"

flap, roll, undulate, wave

is derived from

is derived from

increase and decrease in volume or pitch, as if in waves

"The singer's voice undulated"

undulate

is a type of (narrower)

undergo a change; become different in essence; losing one's or its original nature

"She changed completely as she grew older"; "The weather changed last night"

having a wavy margin and rippled surface

undulate

is similar to

of the margin of a leaf shape; not broken up into teeth