This root form (lemma) is used in 2 different forms in the NT: ἱλασμός (NMS), ἱλασμὸν (AMS).
It is glossed in 2 different ways: ‘a atonement’, ‘the atonement’.
OET 1JHN 2:2 Greek word=ἱλασμός (hilasmos) Morphology=NMS English gloss=‘the atonement’ SR GNT 1JHN 2:2 word 3
OET 1JHN 4:10 Greek word=ἱλασμὸν (hilasmon) Morphology=AMS English gloss=‘a atonement’ SR GNT 1JHN 4:10 word 28