The word "doingest" is an archaic form of the verb "do," which means to perform or carry out an action. It is spelled with a suffix "-est," which is used to denote the second person singular in the present tense. The phonetic transcription of "doingest" is /ˈduɪŋɡəst/, where the stressed syllable is "do-" and the "-ingest" is pronounced as a schwa sound. This word is rarely used in modern English, and its more commonly used forms include "do," "does," and "doing."
The word "doingest" is an archaic form of the present tense second-person singular of the verb "do", primarily used in Middle English. It is derived from the Old English word "dydest", which means "you did" or "you were doing". The "-est" ending is a suffix typical of second-person singular verbs in Old English to denote the present indicative form. Over time, this form of the verb has become obsolete in modern English, and the standard form "do" is now used for all persons in the present tense indicative mood.