I.to make close, compact (very rare): “extremi addensent acies,” Verg. A. 10, 432 Rib.—In pass., of water, to become thick, to thicken: “aquam radice ea addita addensari,” Plin. 20, 21, 84, § 230.
ad-densĕo , ēre, and ăd-denso , āre (cf. Wagner ad Verg. G. 1, 248), 2 and 1, v. a.,