Lewis & Short

mĭsĕresco, ĕre, v. inch. n. [misereo].

  1. I. To feel pity, have compassion (only poet.): his lacrimis vitam damus et miserescimus ultro, Verg. A. 2, 145: miserescite regis, id. ib. 8, 573: generis miseresce tui, Stat. Th. 1, 280.
    1. B. Impers.: miserescit me alicu jus, it distresses me, I feel pity, take compassion (cf. miseret, under misereo, II.): inopis nunc te miserescat mei, Ter. Heaut. 5, 4, 3.
  2. * II. I. q. miserum fieri, to become wretched, miserable: sed quid est homini miseriarum, quo miserescat miser ex animo, Plaut. Ep. 4, 1, 1.