The spelling of "dost evil" may seem peculiar to many people, but it is actually quite straightforward when using IPA phonetic transcription. "Dost" is pronounced as "dʌst," with the "o" being pronounced as a short "u" sound, while "evil" is pronounced as "iːvəl," with the "e" being pronounced as a long "ee" sound. Together, this phrase is often used in Shakespearean English to mean "you do evil," and is a great example of how language evolves over time.
The phrase "dost evil" does not have a direct etymology, as it is a combination of two words: "dost" and "evil".
"Dost" is an archaic verb form of the word "do", specifically used in the second person singular present tense. It indicates an action performed by the subject of the sentence. For example, "thou dost" means "you do". However, it is not commonly used in modern English.
"Evil", on the other hand, originates from Old English "yfel", which referred to something morally wrong, wicked, or harmful. The word has evolved over time and has remained in use to describe morally objectionable behavior, actions, or intentions.
When combined, "dost evil" implies the action of doing or performing something that is considered morally wrong or harmful.