Lewis & Short

informis, e, adj. [2. in-forma], that has no form or not a proper form, unformed, shapeless.

  1. I. Lit.: cum res muta aut informis fit loquens et formata, Auct. Her. 4, 53, 66: alveus, Liv. 21, 26, 9: caro, Plin. 7, 15, 13, § 63.
  2. II. Transf., unshapely, misshapen, deformed, hideous, horrid: cadaver, Verg. A. 8, 264: hiemes, Hor. C. 2, 10, 15: situs, id. Ep. 2, 2, 118: nota in ore, Prop. 1, 5, 16: color, Tib. 4, 4, 6: informes sanguine peltae, Stat. Th. 12, 528: imbre cruento informis facies, Luc. 6, 224: exitus, Tac. A. 6, 49: sors, id. ib. 12, 37: letum, Verg. A. 12, 603: nihil est illis (metallis) informius, Sen. Ep. 94 med.
    Adv.:
    infor-mĭter, hideously, horridly: sonare, Aug. Conf. 12, 29.