Shloka 3.57.3
मारीचवधोत्तरं रामस्य शङ्का-निमित्त-दर्शनं लक्ष्मण-निग्रहश्च (After Maricha’s Slaying: Omens, Anxiety, and Rama’s Rebuke of Lakshmana)
स तस्य स्वरमाज्ञाय दारुणं रोमहर्षणम्।चिन्तयामास गोमायोस्स्वरेण परिशङ्कितः।।।।
sa tasya svaramājñāya dāruṇaṃ romaharṣaṇam | cintayāmāsa gomāyossvareṇa pariśaṅkitaḥ ||
Recognizing that dreadful, hair-raising cry of the jackal, he—Rāma—grew apprehensive at the sound and began to ponder deeply.
Rama knew it was the horrible, horripilating cry of a jackal which made him apprehensive . It made him think.
In the context of ancient Indian literature and Shakuna Shastra (science of omens), the dreadful cry of a jackal is often considered an inauspicious sign indicating impending danger or deceit.
It translates to 'hair-raising' or 'horripilating,' describing the visceral physical reaction of fear or awe Rama felt upon hearing the unnatural or ill-omened sound.