Pronunciation: [ɐksˈɛsɪv] (IPA)
Correct spelling for the English word "Accessive" is [ɐksˈɛsɪv], [ɐksˈɛsɪv], [ɐ_k_s_ˈɛ_s_ɪ_v] (IPA phonetic alphabet).
Additional.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
Correct spelling for Accessive