Sentence:  Sir Feeble: Tis jelousy, the old worm that bites. [To Sir Cautious] Whom is it that you suspect. / Sir Cautious: Alas I know not whom to suspect, I would I did; but if you discover him, I would <WSD>swinge</WSD> him. 
Meaning of the word marked with <WSD> tags:  To strike hard.