Correct spelling for the English word "prepontile" is [pɹɪpˈɒnta͡ɪl], [pɹɪpˈɒntaɪl], [p_ɹ_ɪ_p_ˈɒ_n_t_aɪ_l] (IPA phonetic alphabet).
Anterior, or superior, to the pons Varolii.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.