Correct spelling for the English word "sheldapple" is [ʃˈɛldapə͡l], [ʃˈɛldapəl], [ʃ_ˈɛ_l_d_a_p_əl] (IPA phonetic alphabet).
The chaffinch.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.