The spelling of the phrase "doest work of" may seem unusual, but it is simply an archaic form of "does not work on". The word "doest" is an older variant of "does", which was commonly used in Early Modern English. The IPA transcription for "doest" is /ˈdʌst/. Meanwhile, "work of" is a prepositional phrase that means "operate on" or "affect". The word "work" is pronounced as /wɜːrk/ and "of" as /əv/. Though no longer commonly used today, "doest work of" can still be encountered in older literature and period dramas.