Pronunciation: [ɐsˈast͡ʃən] (IPA)
Correct spelling for the English word "Assastion" is [ɐsˈast͡ʃən], [ɐsˈastʃən], [ɐ_s_ˈa_s_tʃ_ə_n] (IPA phonetic alphabet).
Correct spelling for Assastion