This is the most graphic verse in the Gītā. Arjuna sees the great warriors rushing headlong into Kṛṣṇa’s terrible mouths. He describes a grisly scene where some are stuck between the Lord’s teeth, their heads being crushed to powder (‘cūrṇitair’). It is a brutal, visceral image of total annihilation. The ‘teeth’ and ‘mouths’ are metaphors for the grinding gears of Time. No matter how powerful a king or hero is, they are eventually chewed up by the passage of years and the law of karma. Arjuna is seeing the ‘behind-the-scenes’ reality of the battlefield: everyone he sees standing before him is already being digested by the Absolute. This vision serves to cure Arjuna’s ‘misplaced compassion’. He was crying for people who were already destined for destruction. By seeing their heads being crushed, he understands the finality of material life. It is a shock therapy meant to awaken his sense of duty. The message is clear: the physical world is a place of constant consumption, and only the spirit is eternal.