The spelling of the word "haddest tendency" can be confusing for some as it utilizes archaic English. "Haddest" is the past tense form of "have" and "tendency" refers to the likelihood of a certain behavior or action. In IPA phonetic transcription, "haddest" is pronounced as /ˈhædɪst/ and "tendency" is pronounced as /ˈtɛndənsi/. Although not commonly used in modern language, understanding its origin and pronunciation can aid in comprehending older texts and literature.