παραμάχαιρον
From LSJ
τοῦ εἰδέναι χάριν ἡ πραγματεία → knowledge is the object of our inquiry, the aim of our investigation is knowledge
English (LSJ)
[μᾰ], τό,
A side-dagger, colloquial word, Eust.413.39.
German (Pape)
[Seite 489] τό, dasselbe, Eust. 413, 39.