Lewis & Short

pro-spĕcŭlor, āri, v. n. and a.

  1. I. Neutr., to look into the distance, look out (very rare): de vallo, Auct. B. Afr. 31.
    1. B. Transf., to explore: L. Siccium prospeculatum ad locum castris capiendum mittunt, Liv. 3, 43, 2.
  2. * II. Act., to look out for, watch for: prospeculari e muris adventum imperatoris, Liv. 33, 1, 3.