dire

"a desperate illness"; "on all fronts the Allies were in a desperate situation due to lack of materiel"; "a dire emergency";

"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";