κνηστήρ
From LSJ
ἢ λέγε τι σιγῆς κρεῖττον ἢ σιγὴν ἔχε → either say something better than silence or keep silence (Menander)
English (LSJ)
ῆρος, ὁ,
A scraping-knife, Nic.Th.85, Al.308. II slayer, destroyer, Hsch. III gloss on κνῆστρον, Erot.
German (Pape)
[Seite 1460] ῆρος, ὁ, Schabmesser, Nic. Ther. 85 Al. 308; nach Hesych. auch φονεύς.