The correct spelling for the phrase "wast a witness" is actually "witnessed." The sound "wast" is an archaic form of "were" in the past tense, which is no longer commonly used in modern English. The word "witnessed" is spelled with a long "i" sound in the second syllable, represented in IPA phonetic transcription as /ˈwɪtnɪst/. This means that the "i" in "witnessed" is pronounced like "ih," rather than "ee" or "ai."