The spelling of the word "doest t" might seem confusing, but it is actually made up of two separate words: "doest" and "t". "Doest" is the archaic second-person singular form of the verb "to do", meaning "you do". In IPA phonetic transcription, it is written as /dʌst/. The "t" on the end is likely a contraction of "it", meaning "you do it". In IPA, it would be written as /t/. While this spelling may no longer be commonly used, it is an interesting glimpse into the evolution of English language.
"Doest t" is an archaic and obsolete form of the verb "do" used in Early Modern English. It is a second-person singular present tense conjugation of the verb "do" combined with the archaic second-person singular pronoun "thou" or "you."
In Early Modern English, "do" was used in a variety of ways, including as an auxiliary verb and a main verb. As an auxiliary verb, "do" was used to form questions, negatives, and emphasis. "Doest t" specifically refers to the present tense form used when addressing a single person, either informally using "thou" or more respectfully using "you."
The conjugation "doest t" is formed by adding the suffix "-est" to the base form of the verb "do." The additional "t" at the end is a variant of the final "-st" found in other verbs of the same period. The combination of "doest t" thus signifies the present tense, second-person singular form of the verb "do."
However, it is important to note that this form is considered outdated and is no longer used in contemporary English. Modern English uses "do" as the present tense form for all persons, while also employing other auxiliary verbs such as "does" for the third-person singular.
The word "doest" is derived from Middle English and Old English sources. It is the second person singular form of the verb "do", which means to perform or carry out an action. "Doest" is derived from the Old English word "déest", which is the second person singular form of "dón", meaning to do or perform. Over time, through linguistic changes and simplification, "doest" evolved into its current form in Middle English.