awful, dire, direful, dread(a), dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible
Meaning: causing fear or dread or terror; "the awful war"; "an awful risk"; "dire news"; "a career or vengeance so direful that London was shocked"; "the dread presence of the headmaster"; "polio is no longer the dreaded disease it once was"; "a dreadful storm"; "a fearful howling"; "horrendous explosions shook the city"; "a terrible curse"
She was such a shy, fearsome little body, the females all flouted her; and the males never seemed to notice that there was material in her for a very fine mate.
I could not at first see the beast from which emanated this fearsome challenge, but the sound had the effect of bringing the two victims around with a sudden start, and then I saw the girl's face--she was not Dian!
Anyone who touched it got a fearsome shock-- and such a shock would have been fatal if Captain Nemo had thrown the full current from his equipment into this conducting cable! It could honestly be said that he had stretched between himself and his assailants a network of electricity no one could clear with impunity.
To be held paralyzed, with one's back toward some horrible and unknown danger from the very sound of which the ferocious Apache warriors turn in wild stampede, as a flock of sheep would madly flee from a pack of wolves, seems to me the last word in fearsome predicaments for a man who had ever been used to fighting for his life with all the energy of a powerful physique.