Redoubtable

Adjective

 * 1) Eliciting respect or fear; imposing; awe-inspiring.

Thesaurus
appalling, astounding, awe-inspiring, awesome, awful, celebrated, dire, direful, distinguished, dread, dreaded, dreadful, eminent, famed, fell, formidable, frightful, ghastly, ghoulish, great, grim, grisly, gruesome, hideous, horrendous, horrible, horrid, horrific, horrifying, illustrious, macabre, morbid, notable, prominent, renowned, schrecklich, shocking, terrible, terrific, tremendous