G5398–φοβερός–phoberos

There remains nothing but a certain awful expectation of judgement, and the fury of a fire which before long will devour the enemies of the truth.

φοβερὰ phobera “terrifying”

It is an awful thing to fall into the hands of the ever-living God.

φοβερὸν phoberon “[It is] a fearful thing”

and so terrible was the scene that Moses said, "I tremble with fear."

φοβερὸν phoberon “fearful”