كيفية نطق foul مقابل fowl

“This cloth is too foul to use as a duster.”

“And now I take vpon me the aduentures of holy thynges / & now I see and vnderstande that myn old synne hyndereth me and shameth me / so that I had no power to stere nor speke whan the holy blood appiered afore me / So thus he sorowed til hit was day / & herd the fowles synge / thenne somwhat he was comforted”