Lewis & Short

ăquor, ātus, 1, v. dep. [aqua], to bring or fetch water for drinking.

  1. I. Lit. (a milit. t. t.): aquabantur aegre, Caes. B. C. 1, 78; Auct. B. G. 8, 40: miles gregarius castris aquatum egressus, Sall. J. 93, 2.
  2. II. Metaph., of bees, to get water, Verg. G. 4, 193; Plin. 11, 18, 19, § 61; Pall. Apr. 8, 1.
    Of the earth, to get water, be watered: quam diutissime aquari gaudet (solum), ut praepinguis et densa ubertas diluatur, Plin. 18, 17, 45, § 162 (where some, but unnecessarily, regard aquari as a real passive).