κατώτερος
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)
α, ον, Comp. Adj. from κάτω,
A lower, Hp.Fract.31, LXX 3 Ki.9.17, etc.; τὰ κ. μέρη τῆς Ep.Eph.4.9; more southerly, Vett. Val.34.21. 2 of Time, later, younger, Call.Cer.131. Adv. κατωτέρω, v. κάτω.
German (Pape)
[Seite 1407] compar. zu κάτω, der untere, Hippocr. u. Sp. – Von der Zeit, der spätere, jüngere, Callim. Cer. 131. – Κατωτέρω, s. κάτω.