This root form (lemma) is used in 2 different forms in the NT: ἄδηλα (NNP), ἄδηλον (AFS).
It is glossed in 2 different ways: ‘an uncertain’, ‘unseen’.
OET LUKE 11:44 Greek word=ἄδηλα (adaʸla) Morphology=NNP English gloss=‘unseen’ SR GNT LUKE 11:44 word 14
OET 1COR 14:8 Greek word=ἄδηλον (adaʸlon) Morphology=AFS English gloss=‘an uncertain’ SR GNT 1COR 14:8 word 4