Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
parcī̆prōmus, i, m. [parce-promo], one that gives sparingly, a niggard, curmudgeon (Plautin.): qui cum geniis suis belligerant parcipromi, Plaut. Truc. 1, 2, 81; id. Ps. 5, 1, 22.