Sentence:  A man does not seize a woman by the sleeve and ask, "Is it "you"?" without some reason for an address so destitute of ordinary courtesy; and Lucilla was sufficiently versed in such matters to know that so rude and startling an <WSD>accost</WSD> could be only addressed to some one whose presence set the speaker's heart beating, and quickened the blood in his veins. 
Meaning of the word marked with <WSD> tags:  Address; greeting.