dreadful
adjective
[ ˈdrɛdfʊl ]
• causing or involving great suffering, fear, or unhappiness; extremely bad or serious.
• "there's been a dreadful accident"
Similar:
terrible,
frightful,
horrible,
grim,
awful,
dire,
frightening,
terrifying,
horrifying,
alarming,
distressing,
shocking,
appalling,
harrowing,
ghastly,
fearful,
hideous,
horrendous,
monstrous,
unspeakable,
gruesome,
tragic,
calamitous,
grievous,
grisly,
terrific,
• used to emphasize the degree to which something is the case, especially something regarded with sadness or disapproval.
• "this was all a dreadful mistake"