This root form (lemma) is used in 2 different forms in the NT: γηράσκον (PPA·NNS), γηράσῃς (SAA2··S).
It is glossed in 2 different ways: ‘you may age’, ‘aging is’.
OET JOHN 21:18 Greek word=γηράσῃς (gaʸrasaʸs) Morphology=SAA2··S English gloss=‘you may age’ SR GNT JOHN 21:18 word 17
OET HEB 8:13 Greek word=γηράσκον (gaʸraskon) Morphology=PPA·NNS English gloss=‘aging is’ SR GNT HEB 8:13 word 12