This root form (lemma) is used in 2 different forms in the NT: ἀπόκρυφοι (NMP), ἀπόκρυφον (NNS).
It is glossed in 2 different ways: ‘a secret’, ‘secret’.
OET MARK 4:22 Greek word=ἀπόκρυφον (apokrufon) Morphology=NNS English gloss=‘a secret’ SR GNT MARK 4:22 word 15
OET LUKE 8:17 Greek word=ἀπόκρυφον (apokrufon) Morphology=NNS English gloss=‘secret’ SR GNT LUKE 8:17 word 11
OET COL 2:3 Greek word=ἀπόκρυφοι (apokrufoi) Morphology=NMP English gloss=‘secret’ SR GNT COL 2:3 word 12