Antonyms of adj dreadful

3 senses of dreadful

Sense 1
awful, dire, direful, dread (prenominal), 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")

INDIRECT (VIA alarming) -> unalarming -- (not alarming; assuaging alarm)

Sense 2
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")

INDIRECT (VIA bad) -> good -- (having desirable or positive qualities especially those suitable for a thing specified; "good news from the hospital"; "a good report card"; "when she was good she was very very good"; "a good knife is one good for cutting"; "this stump will make a good picnic table"; "a good check"; "a good joke"; "a good exterior paint"; "a good secretary"; "a good dress for the office")

Sense 3
dreadful -- (very unpleasant)

INDIRECT (VIA unpleasant) -> pleasant -- (affording pleasure; being in harmony with your taste or likings; "we had a pleasant evening together"; "a pleasant scene"; "pleasant sensations")

Similarity of adj dreadful

3 senses of dreadful

Sense 1
awful, dire, direful, dread (prenominal), 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")
       => alarming (vs. unalarming) -- (frightening because of an awareness of danger)

Sense 2
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")
       => bad (vs. good) -- (having undesirable or negative qualities; "a bad report card"; "his sloppy appearance made a bad impression"; "a bad little boy"; "clothes in bad shape"; "a bad cut"; "bad luck"; "the news was very bad"; "the reviews were bad"; "the pay is bad"; "it was a bad light for reading"; "the movie was a bad choice")

Sense 3
dreadful -- (very unpleasant)
       => unpleasant (vs. pleasant) -- (disagreeable to the senses, to the mind, or feelings ; "an unpleasant personality"; "unpleasant repercussions"; "unpleasant odors")