μαρσύππιον

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

Source
Click links below for lookup in third sources:
Full diacritics: μαρσύππιον Medium diacritics: μαρσύππιον Low diacritics: μαρσύππιον Capitals: ΜΑΡΣΥΠΠΙΟΝ
Transliteration A: marsýppion Transliteration B: marsyppion Transliteration C: marsyppion Beta Code: marsu/ppion

English (LSJ)

τό, Dim. of μάρσυππος.