و س نw-s-n
(س) وَسِنَ يَوْسَنُ وَسَنًا وَسِنَةًwasina yawsanu wa-sanan wa-sinatan: to doze, to feel the first onset of sleep. (This verb is not used in the Quran.)
سِنَةٌsinah (اصلاً وِسْنَةٌaṣlan wisnah, verbal noun (maṣdar), also noun (ism dhāt)): drowsiness, slumber. Only once in the Quran: ﴿لَا تَاْخُذُهُۥ سِنَةٌ وَّلَا نَوْمٌ﴾ (Al-Baqarah 2:255)