Correct spelling for the English word "Pronuncial" is [pɹənˈʌnʃə͡l], [pɹənˈʌnʃəl], [p_ɹ_ə_n_ˈʌ_n_ʃ_əl] (IPA phonetic alphabet).
Pert. to the articulation of words.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.