Formidable
Pronunciation : For"mi*da*ble
Part of Speech : a.
Etymology : [L. formidabilis, fr. formidare to fear, dread: cf. F. formidable.]
Definition : Defn: Exciting fear or apprehension; impressing dread; adapted to excite fear and deter from approach, encounter, or undertaking; alarming. They seemed to fear the formodable sight. Dryden. I swell my preface into a volume, and make it formidable, when you see so many pages behind. Drydn.
Syn. -- Dreadful; fearful; terrible; frightful; shocking; horrible; terrific; tremendous.
Source : Webster's Unabridged Dictionary, 1913