Lewis & Short

ob-tŭĕor, ēri (archaic inf. obtuērĭer, Plaut. Am. 3, 2, 19.
A collat. form, obtŭ-or, is assumed to explain indic. pres. obtuĕre, Plaut. Most. 1, 1, 66; 3, 2, 153; and inf. obtŭi, Att. ap. Non. 160, 1; Trag. Rel. v. 285 Rib. al.), v. dep. a.

  1. I. To look at, gaze upon (ante-class.; cf.: intueor, adspicio): aliquem, Plaut. Most. 1, 1, 66; id. Am. 3, 2, 19: terram, to look down, i. e. be cast down, id. Bacch. 4, 4, 17.
  2. II. To see, behold, perceive, Plaut. Most. 3, 2, 153.