The phrase "hath do with" may seem confusing to the modern reader, given the archaic spelling of "hath" and the use of "do" as an auxiliary verb. However, understanding the pronunciation can help make sense of the spelling. "Hath" is pronounced /hæθ/ (hath), with the "a" as in "cat" and a voiced "th" sound. "Do" is pronounced /du/ (doo), with the "oo" as in "book". Thus, "hath do with" can be understood as meaning "has to do with" in modern English.