Webster's Revised Unabridged Dictionary · 1913

Throb

Throb , intransitive verb

[Old English þrobben; of uncertain origin; compare Russ. trepete a trembling, and English trepidation.]

To beat, or pulsate, with more than usual force or rapidity; to beat in consequence of agitation; to palpitate; -- said of the heart, pulse, etc.
My heart Throbs to know one thing. — Shakespeare
Here may his head lie on my throbbing breast. — Shakespeare

Throb , noun

A beat, or strong pulsation, as of the heart and arteries; a violent beating; a papitation:
The impatient throbs and longings of a soul That pants and reaches after distant good. — Addison