Lewis & Short

cŭbo, ŭi, ìtúm, 1 (perf. subj. cubaris, Prop. 2 (3), 15, 17; perf. inf. cubasse, Quint. 8, 2, 20; cf. also Neue, Formenl. II. p. 478), v. n. [cf. κύπτω], to lie down.

  1. I. Of persons.
    1. A. In gen., to be in a recumbent posture, to recline: in lecticā cubans. Cic. Verr. 2, 4, 23, § 51: ut etiam legationes audiret cubans, Suet. Vesp. 24; id. Aug. 33; 43: cubans auspicatur qui in lecto quaerit augurium, Paul. ex Fest. p. 66, 5 Müll.: pisces cubantes = jacentes, flat, Col. 8, 17, 9.
      Far more freq. and class.,
    2. B. With particular access. meanings.
      1. 1. To lie asleep, to sleep: (vilicus) primus cubitu surgat: postremus cubitum eat … uti suo quisque loco cubet, Cato, R. R. 5, 5; cf.: cubitum ire, Cic. Rosc. Am. 23, 64; id. Div. 2, 59, 122: cubitum abire, Plaut. Most. 2, 2, 55: cubitum discedere, Cic. Rep. 6, 10, 10: cubitum se eo conferre, Suet. Aug. 6: cum iste cubaret, in cubiculum introductus est, Cic. Verr. 2, 3, 23, § 56: humi ac sub divo, Suet. Caes. 72: toro, id. Aug. 73; Ov. M. 11, 612 et saep.
        1. b. Of sexual intercourse, to lie: cum aliquā (aliquo), Plaut. Am. prol. 112; 1, 1, 134; id. Mil. 1, 1, 65 al.; Ter. Ad. 5, 3, 65; Cat. 69, 8; 78, 4 al.
          Absol., Plaut. Cist. 1, 1, 46; id. Am. prol. 132; 1, 1, 131 et saep.
      2. 2. To recline at table (cf. accumbo): quo eorum loco quisque cubuisset, Cic. de Or. 2, 86, 353: supra, Suet. Calig. 24: juxta, id. ib. 32; id. Tit. 1: ille cubans gaudet, etc., Hor. S. 2, 6, 110.
      3. 3. To lie sick, to be sick: est ei quidam servus qui in morbo cubat, Plaut. Cas. prol. 37: puerperio, id. Truc. 2, 5, 22: ex duritie alvi, Suet. Ner. 34: aeger, id. Aug. 72.
        Absol., Lucr. 2, 36: haec cubat, ille valet, Ov. H. 20, 164: trans Tiberim longe cubat, Hor. S. 1, 9, 18; 2, 3, 289; id. Ep. 2, 2, 68.
  2. II. Of inanim. objects.
    1. A. In gen.: quā cubat unda freti, lies, extends itself, Mart. 5, 1, 4.
    2. B. In partic., of places, to be in a sloping direction, to slope: cubantia tecta, inclining, sloping, Lucr. 4, 518: Ustica cubans, Hor. C. 1, 17, 12.
      Hence, Ital. covare; Fr. couver.