Real Bible Translation

And of those who became fearsome ones of themselves,^96b and those who are inclining the Faces into the Earth, they spoke toward themselves, "Why are you searching for the one who is living, in company with the Dead Ones?"

Julia Smith Literal 1876 Translation:
And they having, been afraid, and bending the face to the earth, they said to them, Why seek ye the living with the dead.

LITV Translation:
And they becoming terrified, and bowing their faces to the earth, they said to them, Why do you seek the living with the dead?

ESV Translation:
And as they were frightened and bowed their faces to the ground, the men said to them, “Why do you seek the living among the dead?

Footnotes

96b

The adjective ἔμφοβος in its objective sense denotes something that is fear-inducing, terrifying, or awe-inspiring, rather than subjectively afraid. This usage occurs in reference to entities such as the Eumenides (Soph. OC 39) and to fearsome or solemn works of art (Philostr. VA 6.19). The term here expresses an inherent capacity to inspire dread or reverence in others.

Objective Meaning: Causing fear / fearsome

Translation: fear-inducing, terrible, awe-inspiring
Refers to something that inspires fear in others — terrifying in nature or appearance.

Examples:

Sophocles, Oedipus at Colonus 39:
θεαί (the goddesses, i.e., the Eumenides) are called ἔμφοβοι – terrifying or awe-inspiring beings.
Philostratus, Vita Apollonii 6.19:
Used of statues:
σεμνὸν δὲ δὴ ἢ ἔμφοβον τί ἐν τούτοις;
→ “What is in them—dignity or terror?”

See Diccionario Griego–Español (DGE), s.v. ἔμφοβος, I.2, DGE