permacero
From LSJ
Καλὸν τὸ γηρᾶν καὶ τὸ μὴ γηρᾶν πάλιν → Res pulchra senium, pulchra non senescere → Schön ist das Altsein, doch nicht alt sein wieder auch
Latin > English (Lewis & Short)
per-mācĕro: āre, v. a.,
I to soften thoroughly: calculos, to slake completely, Vitr. 7, 2, 1.