ل و حl-w-ḥ
(ن) لَاحَ يَلُوْحُ لَوْحًاlāḥa yalūḥu lawḥan (original form: لَوَحَlawaḥa): to shine, to appear; also to scorch.
لَوْحlawḥ pl. أَلْوَاحal-wāḥ: a tablet, a broad board on which one writes; "اللَّوْح الْمَحْفُوْظal-lawḥ al-maḥfūẓ".
لَوَّاحَةlawwāḥah (pattern فَعَّالَةfaʿʿālah, intensive form): fiercely scorching. Six times in the Quran: ﴿بَلْ هُوَ قُرْآنٌ مَّجِيْدٌ فِيْ لَوْحٍ مَّحْفُوْظٍ﴾ (Al-Burūj 85:21–22), ﴿وَكَتَبْنَا لَهُۥ فِي الْأَلْوَاحِ﴾ (Al-Aʿrāf 7:145), ﴿لَوَّاحَةٌ لِّلْبَشَرِ﴾ (Al-Muddaththir 74:29), ﴿عَلٰى ذَاتِ أَلْوَاحٍ وَّدُسُرٍ﴾ (Al-Qamar 54:13).