The spelling of the phrase "doest volition" is based on Old English pronunciation. The word "doest" is the second person singular form of the verb "do," which was pronounced as "dʊst" (IPA transcription: /dʌst/) in Old English. "Volition" is pronounced as "vo-luh-shuhn" (IPA transcription: /vəˈlɪʃən/), which means the act of making a choice. Together, "doest volition" means that you are making a conscious decision or choice. While this phrase is no longer commonly used in modern English, it provides insight into the history and evolution of language.