Lewis & Short

in-vĕnustus, a, um, adj.

  1. I. Not elegant or graceful, ungraceful, not beautiful, unattractive: scortillum, Cat. 10, 4: non invenustus actor, Cic. Brut. 67, 237: res, Cat. 12, 5: arbustum, Col. 5, 6, 37.
  2. II. (Without Venus, i. e.) Unfortunate in love: invenustae sine munditia et sumptu, Plaut. Poen. 1, 2, 37: homo invenustus aut infelix, Ter. And. 1, 5, 10 Don. ad loc.
    Adv.: in-vĕnustē, not elegantly, ungracefully (postAug.): non invenuste dici videtur, Quint. 1, 6, 27: ludere, Gell. 17, 12, 3; App. de Mundo, p. 70.