Aucto, auctas, auctáre, Frequentatiuum. Plaut.To gaine: to winne: to increase: augment, or multiply.Auctare & alere. Lucret. Auctare aliquem ope. Catul.
Lewis and Short: Latin dictionary
aucto, āre, v. freq. [augeo], to increase or enlarge much (perh. only in the foll. exs.): res rationesque vostrorum omnium Bono atque amplo auctare lucro, Plaut. Am. prol. 6: Unde omnis natura creet res auctet alatque, Lucr. 1, 56: Salve, teque bonā Juppiter auctet ope, Cat. 67, 2.