dreadful, frightful, terrifying, horrifying, appalling ...1689 obs. rare
from French effroyable, from effroi (fright)
FIRST DOCUMENTED USE
1689 - see EXAMPLE below
"...It is probable, the whole Chorus not arriving together, the first come, upon the sight of such an effroyable symptom, either being not sufficiently skilful, or not taking time to examine into the case, might mistake it for an Apoplexy, and too precipitantly advise bleeding, to make room in the Vessels for the Blood to move, and consequently to prevent stagnation, and coagulation..."
From: The Art of Curing Diseases by Expectation with Remarks on a Supposed Great Case of Apoplectick Fits
- Gideon Harvey