ص ف فṣ-f-f
(ن) صَفَّ يَصُفُّ صَفًّاṣaffa yaṣuffu ṣaffan: to form a line, to draw up in rows.
صَفٌّṣaff (also a noun, ism dhāt): line, row, rank. ﴿اِنَّ اللّٰهَ يُحِبُّ الَّذِيْنَ يُقَاتِلُوْنَ فِيْ سَبِيْلِهِۦ صَفًّا﴾ (Aṣ-Ṣaff 61:4)
صَآفٌّṣāff pl. صَآفُّوْنَ وَصَوَآفُّṣāffūna wa-ṣawāffu (active participle, ism fāʿil): one who forms a line, who stands in rows; also (birds) with wings outspread. ﴿وَالصّٰٓفّٰتِ صَفًّا﴾ (Aṣ-Ṣāffāt 37:1); ﴿وَاِنَّا لَنَحْنُ الصَّآفُّوْنَ﴾ (Aṣ-Ṣāffāt 37:165); ﴿وَالطَّيْرُ صٰٓفّٰتٍ﴾ (An-Nūr 24:41); ﴿فَاذْكُرُوا اسْمَ اللّٰهِ عَلَيْهَا صَوَآفَّ﴾ (Al-Ḥajj 22:36)