(ن) حَدَّ يَحُدُّ حَدًّاḥadda yaḥuddu ḥaddan: to fix the outer edge or limit of something, as in marking out the edges, i.e. the boundaries, of a plot.
(ض) حَدَّ يَحِدُّ حِدَّةًḥadda yaḥiddu ḥiddatan: (1) to be furious, to be harsh. (2) for something to be sharp, as a knife is sharp.
حَدٌّḥadd pl. حُدُوْدٌḥudūd (noun, ism dhāt): edge, extremity, limit (the limits of Allah mean the bounds of what He has permitted, beyond which disobedience to Him begins). ﴿تِلْكَ حُدُوْدُ اللّٰهِ فَلَا تَعْتَدُوْهَا﴾ (Al-Baqarah 2:229)
حَدِيْدٌḥadīd (pattern of فَعِيْلٌfaʿīl): (1) iron. ﴿وَاَنْزَلْنَا الْحَدِيْدَ﴾ (Al-Ḥadīd 57:25); (2) sharp. ﴿فَبَصَرُكَ الْيَوْمَ حَدِيْدٌ﴾ (Qāf 50:22)
حِدَادٌḥidād (plural): sharp. ﴿سَلَقُوْكُمْ بِاَلْسِنَةٍ حِدَادٍ﴾ (Al-Aḥzāb 33:19)
Form III (mufāʿalah) حَآدَّ يُحَآدُّ مُحَآدَّةًḥādda yuḥāddu muḥāddatan: to be sharp against one another, to oppose one another. ﴿اِنَّ الَّذِيْنَ يُحَآدُّوْنَ اللّٰهَ وَرَسُوْلَهُۥ﴾ (Al-Mujādilah 58:5)