The phrase "wast authorized" is not a separate word or phrase with its own distinct etymology. Instead, it is a combination of two separate words: "wast" and "authorized".
"Wast" is the second-person singular past tense form of the verb "be" in early modern English. It was used to indicate the past tense of "are" or "were". However, this usage became obsolete in standard English, and today, "were" is the correct past tense form of "be" for the second person singular.
"Authorized" is the past tense form of the verb "authorize", derived from the Latin word "authorizare", meaning "to give authority or sanction". The term "authorize" means to grant official permission or power to someone or something.