Sentence:  Sir, my liege, / Do not <WSD>infest</WSD> your mind with beating on / The strangeness of this business; at pick'd leisure / Which shall be shortly, I'll resolve you, / Which to you shall seem probable, of every / These happen'd accidents; till when, be cheerful / And think of each thing well. 
Meaning of the word marked with <WSD> tags:  To inhabit a place in unpleasantly large numbers; to plague, harass.