νηματικός
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 woven, ὅπλον, of a band of plaited rope or web- bing, Ath.Mech.34.7.
Greek (Liddell-Scott)
νηματικός: -ή, -όν, ὁ ἀνήκων ἢ ἁρμόζων εἰς νῆμα, Ἀθην. π. μηχανημ. ἐν Wesch. Poliore. d. Gr. σ. 34.