Usage: 4 forms in 5 verses
Form Translated As     In Verse(s)
εξέκυψεν he looked out LXX.Ps.102.19
εκκύπτων looking out LXX.Song.2.9
εκκύπτουσα looking LXX.1Sam.13.18
looking out LXX.Song.6.10
εκκέκυφεν look LXX.Jer.6.1

Liddell-Scott-Jones

ἐκκύπτω (ekkuptō) to look out of G:V

ἐκκύπτω,

peep out of, αἰγείρου [Refs 2nd c.AD+]; ἐκκύψασαν ἁλῶναι to be caught peeping out (Reiske for ἐγκ-), [Refs 5th c.BC+]: generally, pop out, [Refs]; of a snail's eyes, Teucer cited in [Refs 2nd c.AD+]: metaphorically, proceed forth, τοῦ νοητοῦ εἰς οὐρανόν [Refs 3rd c.AD+]; compareἐκκέκυφεν· ἀνωρθώθη (-ωσεν codex), [Refs 5th c.AD+]

__II transitive, put forth, [Refs 2nd c.AD+]