κλείς
Alt. κλείς, ίδος
Etym. κλείω
I. "that which serves for closing":
1. "a bar or bolt", drawn or undrawn by a latch or thong (ἱμάς), Hom.
2. "a key", or rather a kind of "catch or hook", by which the bar (ὀχεύς) was shot or unshot from the outside, id=Hom.
3. "a key" (unknown to Hom.), Aesch., Eur.
4. metaph., Ἁσυχία βουλᾶν τε καὶ πολέμων κλαῖδας ἔχοισα Pind.; κλῇς ἐπὶ γλώσσῃ βέβηκε, of enforced silence, Soph.; so, καθαρὰν ἀνοῖξαι κλῇδα φρενῶν Eur.
II. "the hook or tongue" of a clasp, Od.
III. "the collar-bone", so called because it "locks" the neck and breast "together" Il., Soph., etc.
IV. "a rowing bench", which "locked" the sides of the ship together, Od.
V. "a narrow pass, "the key"" of a country, Hdt.; "a strait", Eur.