formidable

FORM'IDABLE, a. [L. formidabilis, from formido, fear.]

Exciting fear or apprehension; impressing dread; adapted to excite fear and deter from approach, encounter or undertaking. It expresses less than terrible, terrific, tremendous, horrible, and frightful.

They seemed to fear the formidable sight.

I swell my preface into a volume, and make it formidable, when you see so many pages behind.