وَأَلۡقَىٰ فِي ٱلۡأَرۡضِ رَوَٰسِيَ أَن تَمِيدَ بِكُمۡ وَأَنۡهَٰرٗا وَسُبُلٗا لَّعَلَّكُمۡ تَهۡتَدُونَ ١٥
And He has cast into the earth firmly set mountains, lest it shift with you, and [made] rivers and roads, that you may be guided,
Translation: Saheeh International (English)
Each word's meaning and sound
He spread out mountains on earth to keep it firm so that it does not shake and cause you to become unsettled. He caused rivers to flow so that you can drink from them and give water to your livestock and crops. He split in it pathways for you to tread and reach your destinations without losing your way.
Al-Mukhtasar in interpreting the Noble Quran