Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prŏpĕdĭem (also separate, prope diem), adv. [prope-dies], at an early day, very soon, shortly (class.), Plaut. Pers. 2, 4, 24; 5, 2, 56: prognostica mea propediem exspecta, Cic. Att. 2, 1, 11: propediem te videbo, id. Div. 1, 23, 47; Sall. C. 56, 4: propediem, prematurely, Liv. 1, 48, 7.