φόβητρον phóbētron

Meaning

a frightening thing, i.e. terrific portent

In the King James Version: fearful sight

Derivation: neuter of a derivative of G5399 (φοβέω);

Where it is used

• Luke 21:11 There will be great earthquakes, famines, and pestilences in various places, along with fearful sights and great signs from heaven.