Lewis & Short

hĭĕmo, āvi, ātum, 1, v. n. and a. [hiems].

  1. I. Neutr.
    1. A. Of persons, to pass the winter, to winter; of soldiers, to keep in winter-quarters: ubi piratae quotannis hiemare soleant, Cic. Verr. 2, 4, 47, § 104: naviget ac mediis hiemet mercator in undis, Hor. Ep. 1, 16, 71: assidue in Urbe, Suet. Aug. 72: tres (legiones), quae circum Aquileiam hiemabant, ex hibernis educit, Caes. B. G. 1, 10, 3: legionem hiemandi causa collocaret, id. ib. 3, 1: cupio scire quid agas et ubi sis hiematurus, Cic. Fam. 7, 9, 1: facies me certiorem, quomodo hiemaris, id. Att. 6, 1 fin.
    2. B. Of things, to be wintry, frozen, cold, stormy (freq. since the Aug. per.; not in Cic.): hiemantes aquae, Sall. Fragm. ap. Sen. Ep. 114: atrum Defendens pisces hiemat mare, storms, Hor. S. 2, 2, 17; Plin. 2, 47, 47, § 125; cf.: repente hiemavit tempestas … totus hiemavit annus … hiemante Aquilone, Arrunt. ap. Sen. Ep. 114: delphini vespertino occasu continui dies hiemant Italiae, Plin. 18, 26, 64, § 235.
      1. 2. Impers., hiemat, it is winter weather, wintry, cold, frosty (post-Aug.): decimo sexto Cal. Febr. Cancer desinit occidere: hiemat, Col. 11, 2, 4: vehementer hiemat, id. ib. 20: hiemat cum frigore et gelicidiis, id. ib. 78; Plin. 18, 35, 79, § 348.
  2. II. Act., to congeal, freeze, turn to ice (post-Aug.): decoquunt alii aquas, mox et illas hiemant, Plin. 19, 4, 19, § 55 (for which: decoquere aquam vitroque demissam in nives refrigerare, id. 31, 3, 23, § 40): hiemato lacu, id. 9, 22, 38, § 75.