The word "haddest to dinner" is not a commonly used term in modern English. However, it can be broken down into two parts: "haddest" and "dinner." The word "haddest" is an archaic form of the verb "have" in the past tense, corresponding to the second person singular form. The IPA transcription for "haddest" is /ˈhædɪst/. As for "dinner," it refers to the main meal of the day and is pronounced as /ˈdɪnər/ in IPA. Together, the phrase means "you (singular) had dinner."