• mā bhaiṣṭa — do not fear
  Aorist prohibitive of √bhī. The classical bhagavat-vāṇī: Kṛṣṇa says it to Arjuna, to the gopīs, to Sudāmā, to every śaraṇāgata. Gauḍīyas hold this as the standing promise the Name carries — every kīrtana is mā bhaiṣṭa spoken by Bhagavān into the soul's ear.
• abhaya-ārāvau — the two whose call gives fearlessness
  Abhaya (fearlessness) + ārāva (sound, cry). The Brothers' very voices grant abhaya. The dual abhaya-ārāvau pairs Kṛṣṇa and Balarāma as twin fountains of abhaya — vātsalya and madhura both founded on this guarantee.
• śāla-hastau — with logs of the śāla tree in Their hands
  Śāla = the tall śāla tree (Shorea robusta); hasta = hand. The Brothers pick weapons from the forest itself — no court swords, no chakras for show. Vraja's response to threats is local, immediate, embodied. (Note: this verse uses 'śāla' without the long ā in some editions.)
• guhyaka-adhamam — the lowest of Guhyakas (Yakṣas)
  Guhyaka = a class of Yakṣa attendant to Kuvera (lit. 'hidden ones,' from √guh). Adhama (lowest, basest). Even within his species, Śaṅkhacūḍa is the worst — Gauḍīyas read: the higher one's birth, the worse one's depravity if dharma is abandoned.

• Padaseva Pr SB 10-34-28 - Sankhachuda Slain
  His Grace Padaseva Prabhu· Oriya
• Romapada Sw SB 10-34-28-30 - Sankachuda runs for his Life - 2020-06-15 Naperville
  His Holiness Romapada Swami· 2020-06-15· English

• Where do you receive Kṛṣṇa's 'do not fear' but not His 'I am acting'?
• What threat could you let Him pursue while you simply stop running?

'Do not fear!' — the Brothers' first speech is precisely Bhagavān's standing offer to the prapanna (BG 18.66 abhayaṁ dāsyāmi). Then śala-trunks in hand, They charge the lowest of Guhyakas. Bhakti receives both gifts at once: the word 'do not fear' and the visible action that backs it up.