Sentence:  HARDCASTLE [Taking the cup.] I hope you'll find it to your mind. I have prepared it with my own hands, and I believe you'll own the ingredients are tolerable. Will you be so good as to <WSD>pledge</WSD> me, sir? Here, Mr. Marlow, here is to our better acquaintance. [Drinks.] 
Meaning of the word marked with <WSD> tags:  To give assurance of friendship by the act of drinking; to drink to one's health.