The spelling of the word "doth into" can be explained using the International Phonetic Alphabet (IPA) as /dʌθ ˈɪntu/. This old-fashioned phrase was commonly used in Early Modern English and is a contraction of "does into". It is usually used in the third person singular form to indicate the present tense of the verb "do". Nowadays, it is rarely used and has been replaced by more modern grammatical structures. Nonetheless, it remains an interesting piece of vocabulary from the past.