late 14c., of uncertain origin, perhaps meant to represent in sound the pulsation of arteries and veins or the heart. Related: Throbbed; throbbing. The noun is first attested 1570s.
Her heart was throbbing
my head is throbbing
he felt a throbbing in his head
thriller
thrive
thro
throat
throaty
throb
throe
thrombo-
thrombophlebitis
thrombosis
thrombus