נִיןnîyn

offspring, posterity (Job 18:19; Isaiah 14:22; Genesis 21:23)

Pronunciation: neen · Hebrew/Aramaic (Old Testament) · H5209

Same root

נוּןnûwn · H5125to resprout, i.e. propagate by shoots; figuratively, to be perpetual

Where it appears

Appears 3 times in the Bible.

Genesis 21:23 “Swear to me in God’s name that you will never deceive me, my children, or any of my descendants. I have been loyal to you, so now swear that you will be loyal to me and to this country where you are living as a foreigner.”
Job 18:19 They will have neither children nor grandchildren, nor any survivor in the place where they lived.
Isaiah 14:22 This is what the Lord of Heaven’s Armies says: “I, myself, have risen against Babylon! I will destroy its children and its children’s children,” says the Lord.

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).