dreadful
From LSJ
Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)
P. and V. δεινός, φοβερός, φρικώδης (Dem. 644). V. δύσχιμος, ἔμφοβος, σμερδνός.
with dreadful looks: V. δεινώψ; see. grim.