Pronunciation: [ɛkskəvˈe͡ɪʃən] (IPA)
Correct spelling for the English word "excurvation" is [ɛkskəvˈe͡ɪʃən], [ɛkskəvˈeɪʃən], [ɛ_k_s_k_ə_v_ˈeɪ_ʃ_ə_n] (IPA phonetic alphabet).