Strong’s H1069 · Hebrew

בָּכַר

bâkar · baw-kar'

Origin a primitive root; properly, to burst the womb, i.e. (causatively) bear or make early fruit (of woman or tree); also (as denominative from בִּכּוּר (H1061))

Meaning to give the birthright

In the King James Version make firstborn, be firstling, bring forth first child (new fruit).

In 4 verses of the King James Version

Leviticus 27:26Only the firstling of the beasts, which should be the LORD’S firstling, no man shall sanctify it; whether it be ox, or sheep: it is the LORD’S.
Deuteronomy 21:16Then it shall be, when he maketh his sons to inherit that which he hath, that he may not make the son of the beloved firstborn before the son of the hated, which is indeed the firstborn:
Jeremiah 4:31For I have heard a voice as of a woman in travail, and the anguish as of her that bringeth forth her first child, the voice of the daughter of Zion, that bewaileth herself, that spreadeth her hands, saying, Woe is me now! for my soul is wearied because of murderers.
Ezekiel 47:12And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine.

From James Strong’s Exhaustive Concordance of the Bible (1890): its Greek dictionary in the edition of Ulrik Petersen, its Hebrew and Chaldee dictionary in that of David Troidl and David Instone-Brewer; the King James words numbered as in the edition the site sets the King James Version from. Public domain.