Pronunciation: [ɪnfˈɛst͡ʃuːəs] (IPA)
Correct spelling for the English word "Infestuous" is [ɪnfˈɛst͡ʃuːəs], [ɪnfˈɛstʃuːəs], [ɪ_n_f_ˈɛ_s_tʃ_uː_ə_s] (IPA phonetic alphabet).