و ق بw-q-b
(ض) وَقَبَ يَقِبُ وَقْبًا وَوُقُوْبًاwaqaba yaqibu wa-qban wa-wuqūban: to sink into the depths, to be hidden; the basic sense is entering a hollow (وَقْبَةwaqbah), which is why the eye-socket is also called وَقْبwaqb. Only once in the Quran, in the description of the night as it spreads over: ﴿وَمِنْ شَرِّ غَاسِقٍ إِذَا وَقَبَ﴾ (Al-Falaq 113:3).