فَعَمِيَتۡ عَلَيۡهِمُ ٱلۡأَنۢبَآءُ يَوۡمَئِذٖ فَهُمۡ لَا يَتَسَآءَلُونَ ٦٦
But the information1 will be unapparent to them that Day, so they will not [be able to] ask one another.
Translation: Saheeh International (English)
1 By which they might invent lies or excuses.
Each word's meaning and sound
So that which they can argue with will become hidden to them and they will not mention anything. They will not ask one another, due to the frightening shock they will be in, because they will know for sure they are heading towards the punishment.
Al-Mukhtasar in interpreting the Noble Quran