Root ص ل ب(S l b) has 7 unique word forms and appears 8 times in the Quran.

English gloss Hard, Stiff, Backbone, Text

Word Translation Occurrences
وَلَأُصَلِّبَنَّكُمۡ and I will surely crucify you, and surely I will crucify you, and I will surely crucify you, and surely I will crucify you 4
صَلَبُوهُ they crucified him, they crucified him 2
فَيُصۡلَبُ he will be crucified, he will be crucified 2
أَصۡلَٰبِكُمۡ your loins, your loins 2
ٱلصُّلۡبِ the backbone, the backbone 2
يُصَلَّبُوٓاْ they be crucified, they be crucified 2
لَأُصَلِّبَنَّكُمۡ I will surely crucify you, I will surely crucify you 2