Lewis & Short

vălesco, ĕre,

  1. I. v. inch. n. [valeo], to grow strong, acquire strength (rare; not in Cic.): (puerorum aetas) tali pacto recreata valescat, Lucr. 1, 942; 4, 17: sucus ex quo omne corpus valescit, Ambros. de Noë et Arca, 9, 28.
  2. II. Trop.: scelera impetu, bona consilia mora valescere, Tac. H. 1, 32: falsa, id. A. 2, 39: superstitiones, id. ib. 11, 15: meditatio et labor in posterum, id. ib. 4, 61.