"What is very interesting is that the singular for (rakham) looks identical to the word for “womb” (rekhem), which is in fact closely related. Hebrew is a very physical language, and concepts that may seem unconnected to us often share the same root…In ancient times in particular, if a woman was able to get pregnant and give birth, it meant that God had bestowed mercy on her and opened her womb (Luke 1:57-58)."
https://www.beitariel.org/single-post/mercy-in-hebrew-thought
Luke 1:57 When it was time for Elizabeth to have her baby, she gave birth to a son. 58 Her neighbors and relatives heard that the Lord had shown her great mercy, and they shared her joy. KJV