"Word of mouth" is a common phrase used to describe information that is passed on from person to person through verbal communication. However, the spelling "wert down mouth" may cause confusion. The correct spelling is "word of mouth." The phonetic transcription for this word is /wəːrd əv maʊθ/. It is important to use the correct spelling and pronunciation to avoid misunderstandings and miscommunication. Always double-check your spelling and pronunciation, especially when using idiomatic expressions in speech or writing.