flat
Undulate is a verb: undulate, undulates, undulated, undulating
Undulate ray was created in 1802.
Undulate- to move in waves or in a way manner (VB)
The bridge undulated as the earthquake rocked the city.
The washer stopped working and wouldn't undulate during the wash cycle...
The word is undulate. It means rise and fall.
The noun forms for the verb to undulate are undulation and the gerund, undulating.
undulate means to move in a wavey like motion. the oposite would be to move parallel or vibrate
it is undulate
Waves undulate.
kinetic
the word you are looking for is UNDULATE.