The spelling of the word "wast disturbing" may seem confusing at first glance. However, it is simply an archaic version of "was disturbing". The word "wast" is the second person singular past tense of "be" in Middle English, and is pronounced /wɑːst/ with a long "a" sound. "Disturbing" is spelled with a double "r" and double "b" to indicate the stress on the second syllable, pronounced as /dɪˈstɜːbɪŋ/. Overall, the phrase means "you were disturbing" and is primarily used in historical or poetic contexts.