The spelling of the phrase "wast schooled" may appear confusing, but it is simply an archaic form of "were educated." The word "wast" is the second person singular past tense of "be" and "schooled" is the past participle of "school." In IPA phonetic transcription, "wast" is pronounced /wɑst/ and "schooled" is pronounced /skuːld/. This phrase is commonly found in literature from the 16th-19th centuries, but is rarely used in modern English.
The term "wast schooled" does not have a clear etymology, as it appears to be a combination of two distinct words: "wast" and "schooled".
"Wast" is an archaic spelling of the word "waste", which means to spend or consume carelessly, or to use up without necessity. The word "waste" itself has Old English origins, derived from the Proto-Germanic word "wēstōną", meaning to devastate or destroy.
"Schooled" is the past tense of the verb "school", which means to educate or train in a specific skill or subject. The word "school" has Middle English origins from the Old English word "scolu", which originally referred to a group of scholars or disciples.
Therefore, "wast schooled" could potentially mean being educated or trained wastefully or carelessly.