Lewis & Short

păciscor, pactus, 3, v. dep. n. and a. (act. collat. form, v. supra) [1. paco], to make a bargain, contract, or agreement with any one; to covenant, agree, stipulate, bargain, contract respecting any thing (cf.: transigo, stipulor, pango).

  1. I. Lit.
    1. A. In gen.
          1. (α) Neutr.: pacisci cum illo paululā pecuniā potes, Plaut. Bacch. 4, 8, 24; Cic. Verr. 2, 3, 14, § 36; Ov. M. 4, 702: paciscitur magnā mercede cum Celtiberorum principibus, ut, etc., Liv. 25, 33; cf.: pacti sunt inter se, ut die statutā, Just. 1, 10, 4; 16, 4, 7; 38, 3, 5; cf. esp. id. 3, 6, 10: votis pacisci, Ne Cypriae Tyriaeque merces Addant avaro divitias mari (= votis transigere cum dis), Hor. C. 3, 29, 59: de mercedibus, Suet. Gram. 7.
          2. (β) Act.: quae pacisci modo scis, set quod pacta’s, non scis solvere, Plaut. Ps. 1, 2, 89: argentum, id. ib. arg. 1, 9: quam (provinciam) sibi pactus erat, Cic. Sest. 25, 55: rem, Auct. Her. 2, 13, 20: pecuniam cum aliquo, Auct. B. Alex. 55: omnibus proscriptis, reditum salutemque pactus est, Vell. 2, 77, 2: ab aliquo vitam, Sall. J. 26, 1; so, pactus in singulos (homines) minas decem a tyranno, Plin. 35, 10, 36, § 99: cum Xerxe nuptias filiae, Just. 2, 15, 14.
            With object-clause: Leucippo fieri pactus uterque gener, Ov. F. 5, 702: dimitti (eum) pactus, si, etc., Plin. 8, 7, 7, § 18.
            In part. fut. pass.: ut firma fierent paciscenda, Amm. 31, 12, 13.
    2. B. In partic., of a marriage-contract, to betroth a woman (syn.: despondeo, spondeo): ex quā pactus esset vir domo, in matrimonium duceret, Liv. 4, 4, 10: Etutam pacto fratri eum invidisse, id. 44, 30, 4.
  2. II. Trop., to barter, hazard, stake (poet.): vitam pro laude, Verg. A. 5, 230: letum pro laude, id. ib. 12, 49: aevum pro luce, Stat. Th. 1, 317.