turīya—transcendental; viśuddha-sattva—pure existence; saṅkarṣaṇa nāma—named Saṅkarṣaṇa; tiṅho yāṅra aṁśa—of whom that Saṅkarṣaṇa is also a partial expansion; sei nityānanda-rāma—that person is known as Balarāma or Nityānanda.