أ خ وʾ-kh-w
[akh]: brother; one of the five nouns (al-asmāʾ al-khamsah), in the nominative أَخُوakhū, in the accusative أَخَاakhā, in the genitive أَخِيakhī. ﴿اِذْ قَالَ لَهُمْ اَخُوْهُمْ نُوْحٌ﴾ (Ash-Shuʿarāʾ 26:106)Plural: إِخْوَةikhwah (current mostly for brothers by blood). ﴿اِنَّمَا الْمُؤْمِنُوْنَ اِخْوَةٌ﴾ (Al-Ḥujurāt 49:10)
إِخْوَانikhwān (in the wider sense of friendship/brotherhood). ﴿فَاَصْبَحْتُمْ بِنِعْمَتِهِۦٓ اِخْوَانًا﴾ (Āl ʿImrān 3:103)Feminine: أُخْتukht, plural: أَخَوَاتakhawāt. ﴿يٰٓاُخْتَ هٰرُوْنَ﴾ (Maryam 19:28); ﴿وَاَخَوٰتُكُمْ﴾ (An-Nisāʾ 4:23)