The spelling of "marching cannons mouth" may seem confusing, but it can be broken down using IPA phonetic transcription. The first syllable "mar-" sounds like /mɑr/ with an open "a" and an "r" sound. The second syllable "-ching" sounds like /tʃɪŋ/ with a "ch" sound followed by an "i" and an "ng". The third syllable "-can-" sounds like /kæn/ with a short "a" and a hard "c" sound. The fourth syllable "-nons" sounds like /nɑns/ with a nasal "n" and an open "a" sound. The final syllable "-mouth" sounds like /maʊθ/ with a "ow" sound and a "th" sound.