Sanjay begins to describe what appeared. Countless mouths. Countless eyes. Wonders beyond number. Divine ornaments everywhere. Divine weapons held aloft in countless hands. The word 'aneka' — countless, many — repeats again and again. Sanjay is reaching for language and finding it insufficient.
Picture standing before a night sky so clear that the stars are not dots but rivers of light pouring across the darkness, more than your eyes can track, more than your mind can hold. Now multiply that. Sanjay is trying to describe a form where every glance reveals something new — another face, another eye, another weapon gleaming, another ornament shining.
This shloka and the next (11.11) form a single description, split across two verses. Together they paint the first impression of the Vishwarupa — sheer, overwhelming multiplicity contained within one being.