Liddell-Scott-Jones

κρύφιος (kruphios) private ^G:A

κρύφιος-ιος [ῠ], α, ον,

also ος, ον [Refs 5th c.BC+]:— hidden, concealed, [Refs 5th c.BC+].

__2 secret, clandestine, [Refs 8th c.BC+]. adverb -ίως Ps.- [Refs 2nd c.AD+]
__3 occult, [Refs 5th c.AD+]; latent, [Refs]. adverb -ίως [Refs]
__4 vocative κρύφιοςιε such an one, [LXX]
__5 κρύφιοςιος, ὁ, fabulous gem, Ps.-[Refs 1st c.AD+]
__6 κρύφιοςιος, ὁ, title of a grade of initiates in the mysteries of Mithras, [Refs]

_{LSJ Scripture Refs: LXX.Ruth.4.1}