Asalaamu alaykum wa rahmatullah wa barakaatuh
وَلَوْ تَرَىٰ إِذِ الْمُجْرِمُونَ نَاكِسُو رُءُوسِهِمْ عِندَ رَبِّهِمْ رَبَّنَا أَبْصَرْنَا وَسَمِعْنَا فَارْجِعْنَا نَعْمَلْ صَالِحًا إِنَّا مُوقِنُونَ
Al mujrimoona NAAKISoo ru’oosihim ‘inda Rabbihim –
If you could but see when the criminals are hanging their heads before their Lord, [saying], “Our Lord, we have seen and heard, so return us [to the world]; we will work righteousness. Indeed, we are [now] certain.”
surah al Sajdah 32:12
Naakis = to put something upside down. I.e. If a cup is facing up, when it is Naakis = it is placed upside down.
So Allah is saying that the Criminals on Judgment Day will have their faces turned upside down.
But other words could be used to describe their faces being ‘lowered’ and humbled, but Allah powerfully chose the word Naakis. Why?
The criminals are arrogant in this life, they walk on the Earth with pride and keep their nose in the air. The believer walks with his head and gaze lowered.
So on Judgment Day, they will see the reality of Hellfire awaiting them. Their arrogance did not benefit them, so 1 – their head after being up in the worldly life (out of Arrogance) has turned upside down (out of fear and humiliation). Not just that, 2 – in the worldly life – their head used to be the highest part of their body (above the neck), but on Judgment Day – the criminals will be thrown onto the floor on their faces and dragged into Hellfire.
All this has been depicted through just one word – Naakis.