What is another word for couldst do?
Pronunciation: [kˈʊdst dˈuː] (IPA) 
The phrase "couldst do" can be replaced with several synonyms. "Could accomplish," "could execute," "could perform," and "could achieve" all convey a similar meaning.
"Couldst do" implies the ability to achieve something. Using synonyms for this phrase can add variety to writing and make the language more intriguing. For example, "If thou couldst do this task, thou wouldst be rewarded" could be rephrased as "If thou had the ability to accomplish this task, thou would be given a reward."
In summary, there are several synonyms for "couldst do" that can make writing more interesting and add variety to language.
