The spelling of the word "haddest a seat" follows Old English conventions. The word "haddest" is the second person singular past tense form of the verb "to have," and it is pronounced /ˈhædɪst/. The phrase "a seat" is pronounced /ə siːt/ and refers to a place to sit. Together, "haddest a seat" means "you had a seat." While not commonly used in modern English, knowledge of Old English spellings and pronunciations can enhance understanding of the language's development.