The correct spelling of the third person singular present tense form of the verb 'exterminate' is 'doth exterminate'. The archaic spelling 'doest exterminate' can still be found in older texts, but is not commonly used anymore. In IPA phonetic transcription, the correct pronunciation of 'doth exterminate' is /dʌθ ɪkˈstɜːmɪneɪt/. The 'th' sound is vital to the correct pronunciation of the word and distinguishes it from the present tense form 'exterminates' (/ɪkˈstɜːmɪneɪts/) in which the 'th' sound is replaced with a 't' sound.
The phrase "doest exterminate" is a combination of two words: "doest" and "exterminate".
1. "Doest": This is an archaic form of the second-person singular present tense of the verb "do". It was commonly used in Early Modern English, particularly in the King James Version of the Bible and Shakespearean works. It means "you do" or "you perform".
2. "Exterminate": This word comes from the Latin verb "exterminare", which combines "ex" (meaning "out of" or "away from") and "terminus" (meaning "boundary" or "end"). The Latin root suggests the idea of removing or eradicating something completely. In English, "exterminate" typically means to kill, destroy, or eliminate something or someone, especially in large numbers.