(ن) صَفَا يَصْفُوْ صَفْوًا وَصَفَآءًṣafā yaṣfū ṣafwan wa-ṣafāʾan: of a thing, to be free of every admixture, to be pure.
اَلصَّفَاaṣ-ṣafā: the name of a hill near the Kaʿbah (the rock of this hill is perfectly smooth and pure). ﴿اِنَّ الصَّفَا وَالْمَرْوَةَ مِنْ شَعَآئِرِ اللّٰهِ﴾ (Al-Baqarah 2:158)
Form IV (ifʿāl) اَصْفٰى يُصْفِيْ اِصْفَآءًaṣfā yuṣfī iṣfāʾan (original form: اَصْفَوَ يُصْفِوُ اِصْفَاوًاaṣfawa yuṣfiwu iṣfāwan): to purify someone of admixture, to set someone apart from others for a particular thing or task. ﴿اَفَاَصْفٰىكُمْ رَبُّكُمْ بِالْبَنِيْنَ﴾ (Al-Isrāʾ 17:40)
Form II (tafʿīl) صَفّٰى يُصَفِّيْ تَصْفِيَةًṣaffā yuṣaffī taṣfiyatan (original form: صَفَّوَ يُصَفِّوُṣaffawa yuṣaffiwu): to clear a thing of admixture; مُصَفًّيmuṣaffany (passive participle, ism mafʿūl; original form مُصَفَّوٌmuṣaffaw): purified, clarified. ﴿وَاَنْهٰرٌ مِّنْ عَسَلٍ مُّصَفًّي﴾ (Muḥammad 47:15)
Form VIII (iftiʿāl) اِصْطَفٰى يَصْطَفِيْ اِصْطِفَآءًiṣṭafā yaṣṭafī iṣṭifāʾan (original form: اِصْتَفَوَ يَصْتَفِوُ اِصْتِفَاوًاiṣtafawa yaṣtafiwu iṣtifāwan): to set someone apart for oneself; with this basic sense it is used in two meanings: (1) to pick out, to select (2) to prefer someone over others, to favour. ﴿اِنَّ اللّٰهَ اصْطَفٰٓى اٰدَمَ وَنُوْحًا﴾ (Āl ʿImrān 3:33)
مُصْطَفًيmuṣṭafany pl. مُصْطَفَوْنَmuṣṭafawna (passive participle, ism mafʿūl; original form مُصْطَفَوٌmuṣṭafaw): chosen. ﴿وَاِنَّهُمْ عِنْدَنَا لَمِنَ الْمُصْطَفَيْنَ الْاَخْيَارِ﴾ (Ṣād 38:47)