Pronunciation: [ɑː dˌa͡ʊn mˈa͡ʊθ] (IPA)
Correct spelling for the English word "are down mouth" is [ɑː dˌa͡ʊn mˈa͡ʊθ], [ɑː dˌaʊn mˈaʊθ], [ɑː d_ˌaʊ_n m_ˈaʊ_θ] (IPA phonetic alphabet).