Pronunciation: [wɒst ɹˈiːzənəbə͡l] (IPA) 
The correct spelling of the phrase "wast reasonable" is actually "was reasonable." The spelling error likely results from the archaic form of the verb "to be," which was "wast" in Old English. The correct pronunciation of "was" is /wʌz/, with a voiced "z" sound at the end. Remembering the proper spelling and pronunciation of common phrases can help avoid confusion and errors in written communication.
The phrase "wast reasonable" is an archaic construction that comes from Middle English. Let's break down the etymology:
1. "Wast": This is the archaic second person singular past tense of the verb "be" (am, is, are). This form was commonly used in Middle English. It evolved from Old English "wǣre" and ultimately from Proto-Germanic "wēsai".
2. "Reasonable": This word comes from the Old French adjective "raisonnable", which means "rational" or "well-founded". It was derived from the noun "raison" (reason) and the Latin word "rationabilis", meaning "rational". Over time, the meaning of "reasonable" expanded to include notions of fairness and sound judgment.
So, when combined, the phrase "wast reasonable" means "you were rational" or "you were being reasonable".
