The spelling of the word "haddest lot to do with" can be explained using the International Phonetic Alphabet (IPA). The word "haddest" is pronounced /ˈhædɪst/, with the two "d" sounds being pronounced as a voiced dental fricative /ð/. The phrase "lot to do with" is pronounced /lɒt tuː duː wɪð/, with the "o" sound in "lot" being pronounced as a short vowel /ɒ/ and the "oo" sound in "do" being pronounced as a long vowel /uː/. This phrase means that something was a major factor or contributor to an outcome or situation.
The phrase "haddest lot to do with" is a combination of two idiomatic expressions, "had to do with" and "haddest lot".
The expression "had to do with" means to be involved or connected with something, to play a role or have an influence on a particular matter or situation. It implies that someone or something is related, linked, or responsible for an event or outcome. For example, if I say, "He had a lot to do with the success of the project," it means he played a significant role or was largely responsible for the project's success.
On the other hand, the phrase "haddest lot" is a grammatical construction that utilizes the archaic second-person singular form of the verb "to have" (haddest) in conjunction with "lot" to indicate a large amount or a significant share. It can be interpreted as having a great deal or a substantial portion.
When combined, "haddest lot to do with" expresses that someone or something had a significant role or a considerable influence on a particular situation or outcome. It emphasizes the level of involvement or contribution to the matter at hand. For instance, if I say, "He haddest lot to do with the rise of the company," it means he played a crucial role or had a substantial impact on the company's development or success.