Pronunciation: [lˈavɪʃɪŋ ˌʌp ˈɒn] (IPA)
Correct spelling for the English word "lavishing up on" is [lˈavɪʃɪŋ ˌʌp ˈɒn], [lˈavɪʃɪŋ ˌʌp ˈɒn], [l_ˈa_v_ɪ_ʃ_ɪ_ŋ ˌʌ_p ˈɒ_n] (IPA phonetic alphabet).