||Abimelekh then asked Abraham, 'What did you see to make you do such a thing?'
Vayomer Avimelech el-Avraham mah ra'ita ki asita et-hadavar hazeh.
||Abraham replied, 'I realized that the one thing missing here is the fear of God. I could be killed because of my wife.
Vayomer Avraham ki amarti rak eyn-yir'at Elohim bamakom hazeh vaharaguni al-devar ishti.
||In any case, she really is my sister. She is the daughter of my father, but not the daughter of my mother. She [later] became my wife.
Vegam omnah achoti vat-avi hi ach lo vat-imi vatehi-li le'ishah.
Also denotes any close relative. See Genesis 13:8.
|daughter of my father|
He actually meant, 'granddaughter of my father,' since Sarah was a granddaughter of Terach. Sarah was the daughter of Abraham's brother Haran (see note on Genesis 11:29). (cf. Rashi).