pulsating
adjective
[ pʌlˈseɪtɪŋ ]
• characterized by a strong regular rhythm; throbbing.
• "a pulsating bass line"
pulsate
verb
• expand and contract with strong regular movements.
• "blood vessels throb and pulsate"
Origin:
late 17th century (earlier (Middle English) as pulsation ): from Latin pulsat- ‘throbbed, pulsed’, from the verb pulsare, frequentative of pellere ‘to drive, beat’.