verbper-mācĕroPER-MACERO☆ KeepMeaningto soften thoroughlyLewis & Short 1879ModernAs printed, 1879PERMACEROLEWIS & SHORTPERMACEROper-mācĕro, āre, v. a., I. to soften thoroughly: calculos, to slake completely, Vitr. 7, 2, 1.Read the whole entry