Pronunciation: [bˈa͡ʊsɪŋ] (IPA)
Correct spelling for the English word "bousing" is [bˈa͡ʊsɪŋ], [bˈaʊsɪŋ], [b_ˈaʊ_s_ɪ_ŋ] (IPA phonetic alphabet).
Correct spelling for bousing