Correct spelling for the English word "Prateful" is [pɹˈe͡ɪtfə͡l], [pɹˈeɪtfəl], [p_ɹ_ˈeɪ_t_f_əl] (IPA phonetic alphabet).
Talkative.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.