Sentence:  In one little body / Thou counterfeit'st a bark, a sea, a wind; / For still thy eyes, which I may call the sea, / Do ebb and flow with tears; the bark thy body is, / Sailing in this salt flood; the winds, thy sighs; / Who, raging with thy tears, and they with them, / Without a sudden calm, will <WSD>overset</WSD> / Thy tempest-tossed body. 
Meaning of the word marked with <WSD> tags:  To knock over, capsize, overturn.