The phrase "wast grateful" is an archaic form of the word "was grateful," which means expressing gratitude or being thankful. The spelling may seem odd, but it reflects the pronunciation of English in the past. The IPA (International Phonetic Alphabet) transcription for this phrase is /wɑːst ˈɡreɪtfʊl/, where the first sound, /w/, is like a "wuh" sound, the long "a" sound represented by /ɑː/ is like "ahh," the "st" cluster is pronounced together, and the final syllable has the "a" sound represented by /ʊl/.