σάπων
From LSJ
Κρεῖττον σιωπᾶν ἐστιν ἢ λαλεῖν μάτην → Silentium anteferendum est vaniloquentiae → Das Schweigen übertrifft vergebliches Geschwätz
English (LSJ)
[ᾱ], ωνος, ὁ, Lat.
A sapo, soap, τῷ Γερμανικῷ σμήγματι (καλεῖται δὲ σ.) Ruf. ap. Orib.45.29.59, cf. Asclep. ap. Gal.12.586, Aret.CD 2.13:—a Gallic invention (hair-dye) adopted by the Germans acc. to Plin.HN28.191. [ᾱ, Seren.Sammon.153.] (The Germanic forms (OHG. seifa, OE. sápe, etc.) come fr.prim. Germanic *saipjō, whence also Finn. saippio; cf. σήπων.)