Lewis & Short

in-grăvo, āvi, ātum, 1, v. a. (poet. and in post-Aug. prose).

  1. I. To weigh down: puppem, Stat. Th. 5, 402.
  2. II. Transf.
    1. A. To cause its weight to be felt, to oppress, molest: saevitia hiemis ingravat, Plin. 19, 8, 51, § 166: annis ingravantibus, Phaedr. 5, 10, 3.
    2. B. To render worse, to aggravate: ingravat haec saevus Drances, Verg. A. 11, 220: illa meos casus ingravat, illa levat, Ov. Tr. 3, 4, 60.
    3. C. To make severe (eccl. Lat.): ingravavit cor suum, he hardened his heart, Vulg. Exod. 8, 15; in pass., ib. 7, 14 al.