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
ἔνδεσις, ἁρμογή, ἀγκτήρ, ἀντοχή, ἁφή, ἀνάμιξις, ἀνάκρασις, ἄθροισμα, ἕνωσις, εἱρμός, ἑνότης, ἔμμιξις, ἐγκόλλησις, ἁρμή, ἄνθεξις
