ف ص حf-ṣ-ḥ
(ک) فَصُحَ يَفْصُحُ فَصَاحَةًfaṣuḥa yafṣuḥu faṣāḥatan: (of the tongue) to be clear and fluent, to speak eloquently.
فَصِيْحfaṣīḥ: eloquent of tongue. (This verb is not used in the Quran.)
اَفْصَحُafṣaḥu (elative (ism tafḍīl)): more eloquent, clearer in speech. Only once in the Quran, in the words of Moses (peace be upon him): ﴿وَأَخِيْ هَارُوْنُ هُوَ أَفْصَحُ مِنِّيْ لِسَانًا﴾ (Al-Qaṣaṣ 28:34).