Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)
κλέπτω, κρύβδην, κρύφα, κρυφαῖος, κρυφῇ, κρυφηδόν, κρύφιος, σιγή, σκότιος