Surah Al-Kahf 18:41

أَوْ يُصْبِحَ مَآؤُهَا غَوْرًا فَلَن تَسْتَطِيعَ لَهُۥ طَلَبًا

Or its water will become sunken [into the earth], so you would never be able to seek it."

Translation: Saheeh International

Tafsir

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 …

Excerpt from Tafsir al-Jalalayn, commentary on 18:41, via Quran.com. The reader has the full commentary and 9 more tafsirs.