Strong H6113 עָצַר ‛âtsar · to restrain

Genesis

1. Genesis 16:2
   And Sarai said unto Abram, Behold now, the Lord hath restrained me from bearing: I pray thee, go in unto my maid; it may be that I may obtain children by her. And Abram hearkened to the voice of Sarai.
2. Genesis 20:18
   For the Lord had fast closed up all the wombs of the house of Abimelech, because of Sarah Abraham’s wife.