key
From LSJ
ἕτερος ἐξ ἑτέρου σοφός τό τε πάλαι τό τε νῦν → one gets his skill from another, now as in days of old
English > Greek (Woodhouse)
subs.
P. and V. κλῄς, ἡ. Small keys with three teeth: Ar κλειδία . . . τρεῖς ἔχοντα γομφίους (Thesm. 421). Met., see interpretation. Seeing that the place was the key of Sicily: P. ὁρῶντες προσβολὴν ἔχον τὸ χωρίον τῆς Σικελίας (Thuc. 4, 1).