Why were the words "nasib" (portion) used for a good deed and "kifl" (share) for a bad deed in the noble verse: "Whoever intercedes with a good intercession will have a portion thereof; and whoever intercedes with a bad intercession will have a share thereof. And Allah is over all things a Maintainer"?

The noble verse: ﴿Whoever intercedes with a good intercession will have a share from it, and whoever intercedes with a bad intercession will have a portion from it. And Allah is over all things a Maintainer.﴾ [An-Nisa: 85] indicates that both "nasīb" (share) and "kifl" (portion) refer to a lot, but "kifl" specifically pertains to evil. Good intercession: Mediation to bring about good or avert evil. It is recommended, and its doer is rewarded. Bad intercession: Mediation to avert a right or bring about falsehood. It is strongly forbidden. Good deeds are multiplied tenfold, and bad deeds are recompensed with their like, as stated in His Almighty's saying: ﴿Whoever comes with a good deed will have ten times its like, and whoever comes with a bad deed will not be recompensed except with its like; and they will not be wronged.﴾ [Al-An'am: 160].