ل غ وl-gh-w
(ن) لَغَا يَلْغُوْ لَغْوًاlaghā yalghū laghwan (original form: لَغَوَ يَلْغُوُlaghawa yalghuwu): to speak thoughtlessly, to talk idly, to make a clamour. ﴿وَالْغَوْا فِيْهِ لَعَلَّكُمْ تَغْلِبُوْنَ﴾ (Fuṣṣilat 41:26)
لَغْوٌlaghw (verbal noun, maṣdar; also a noun, ism dhāt): meaningless and useless talk or action. ﴿وَالَّذِيْنَ هُمْ عَنِ اللَّغْوِ مُعْرِضُوْنَ﴾ (Al-Muʾminūn 23:3); ﴿لَا يُؤَاخِذُكُمُ اللّٰهُ بِاللَّغْوِ فِيْٓ اَيْمَانِكُمْ﴾ (Al-Baqarah 2:225)
لَاغِيَةٌlāghiyah (active participle, ism fāʿil, feminine): idle talk. ﴿لَّا تَسْمَعُ فِيْهَا لَاغِيَةً﴾ (Al-Ghāshiyah 88:11)