προθετικός
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
English (LSJ)
ή, όν, (
A πρόθεσις 11) setting before itself, ἡ ἀρετὴ π. [τοῦ τέλους] Arist.MM1190a19; opp. ποιητικός, connected with planning, opp. execution, prob.l. ib.21. II of or for prefixing, π. μόριον preposition, D.H.Amm.2.2; prepositional, σύνδεσμοι Stoic. ap. A.D. Synt.305.24; σύνταεις A.d.l.c.22.
German (Pape)
[Seite 723] ή, όν, zum Vorsetzen gehörig, Sp.; μόριον, die Präposition, D. Hal.