The spelling of the phrase "doth washing" can be explained using the International Phonetic Alphabet (IPA). The first word, "doth" is pronounced as /dʌð/, with the "th" sound represented by the symbol θ. The second word, "washing" is pronounced as /ˈwɒʃɪŋ/, with the "sh" sound represented by the symbol ʃ. Together, the phrase is pronounced as /dʌð ˈwɒʃɪŋ/. "Doth washing" is an archaic phrase meaning to wash or cleanse, usually used in old English literature.