undulating motion of water

sound wave or vibration

ध्वनि तरंग

English Usage: The speaker produces sound waves.

Hindi Usage: वक्ता ध्वनि तरंगें उत्पन्न करता है।

to move one's hand in greeting or as a signal

to fluctuate or vary

बदलाव होना

English Usage: The stock prices began to wave this morning.

Hindi Usage: आज सुबह शेयर की कीमतें बदलने लगीं।