The word "hath sized up" seems a bit confusing at first glance due to its archaic language and spelling. However, when broken down phonetically it becomes clearer. "Hath" is pronounced /hæθ/, and means "has" in modern English. "Sized" is pronounced /saɪzd/ and means "evaluated." Lastly, "up" is pronounced /ʌp/ and means "completely." Therefore, the phrase "hath sized up" translates to "has evaluated completely." The spelling of the word may seem strange, but it reflects the language of an older time period.