DREADFUL

adj. 1 bad, awful, terrible, Colloq rotten, Slang lousy That TV soap opera is simply dreadful 2 grievous, dire, horrible, horrendous, horrifying, horrid, monstrous, fearful, feared, frightful, dread, frightening, shocking, alarming, appalling, fearsome, hideous, ghastly, atrocious, heinous, wicked, evil, iniquitous, villainous, flagitious, fiendish, diabolical, devilish, demonic, malevolent, maleficent, malefic, Colloq scary They did the most dreadful things to political prisoners