غَيَابَةٌ

The part of anything that veils, or conceals, And hence,The bottom of a جُبّ [or well]

A covert, or place of concealment, of birds.

جُبٌّ

A well, or a well not cased with stone or a well containing much water, or a deep well

قَالَ قَائِلٌ مِنْهُمْ لَا تَقْتُلُوا يُوسُفَ وَأَلْقُوهُ فِي غَيَابَتِ الْجُبِّ يَلْتَقِطْهُ بَعْضُ السَّيَّارَةِ إِنْ كُنْتُمْ فَاعِلِينَ ﴿۱۰﴾ Yusuf : 10

Said a speaker among them, "Do not kill Joseph but throw him into the bottom of the well; some travelers will pick him up - if you would do [something]