This root form (lemma) is used in 2 different forms in the NT: εἰλικρινείας (GFS), εἰλικρινείᾳ (DFS).
It is glossed in 2 different ways: ‘of sincerity’, ‘sincerity’.
OET 1COR 5:8 Greek word=εἰλικρινείας (eilikrineias) Morphology=GFS English gloss=‘of sincerity’ SR GNT 1COR 5:8 word 18
OET 2COR 1:12 Greek word=εἰλικρινείᾳ (eilikrineia) Morphology=DFS English gloss=‘sincerity’ SR GNT 2COR 1:12 word 19
OET 2COR 2:17 Greek word=εἰλικρινείας (eilikrineias) Morphology=GFS English gloss=‘sincerity’ SR GNT 2COR 2:17 word 16