This is a brief sub-gloss. For a fuller reading of this verse, see Madhusūdana, Śaṅkara, or Rāmānuja above.
Bound fast by your own action, born of your nature, the heroism and the rest already described, Kaunteya, the very action you do not wish to do out of delusion, out of want of discernment, you will do even against your will, helpless, in another's power.
Contemporary English rendering of the Sanskrit bhāṣya, pending scholar review.