Pronunciation: [ɛnvˈɒljuːm] (IPA)
Correct spelling for the English word "Envolume" is [ɛnvˈɒljuːm], [ɛnvˈɒljuːm], [ɛ_n_v_ˈɒ_l_j_uː_m] (IPA phonetic alphabet).
Correct spelling for Envolume