﴿ أَوْ يُصْبِحَ مَآؤُهَا غَوْرًۭا فَلَن تَسْتَطِيعَ لَهُۥ طَلَبًۭا ﴾

“or its water sinks deep into the ground, so that thou wilt never be able to find it again!"”

or maybe its water will sink deep down ghawran functions in meaning like ghā’iran and it constitutes a supplement to yursila ‘He will unleash’ but not a supplement to tusbiha ‘it becomes’ because the sinking of water deep into the earth does not necessarily result from thunderbolts so that you have no means of acquiring it’ no possible way of reaching it.