Adjective terrible has 4 senses
- awful, dire, direful, dread, dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible - 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"
Antonym: unalarming (indirect, via alarming)
- atrocious, abominable, awful, dreadful, painful, terrible, unspeakable - exceptionally bad or displeasing; "atrocious taste"; "abominable workmanship"; "an awful voice"; "dreadful manners"; "a painful performance"; "terrible handwriting"; "an unspeakable odor came sweeping into the room"
Antonym: good (indirect, via bad)
- severe, terrible, wicked - intensely or extremely bad or unpleasant in degree or quality; "severe pain"; "a severe case of flu"; "a terrible cough"; "under wicked fire from the enemy's guns"; "a wicked cough"
Antonym: mild (indirect, via intense)
- fearful, frightful, terrible - extremely distressing; "fearful slum conditions"; "a frightful mistake"; "suffered terrible thirst"
Antonym: good (indirect, via bad)
,