Antonyms of adj pleasant

2 senses of pleasant

Sense 1
pleasant (vs. unpleasant) -- (affording pleasure; being in harmony with your taste or likings; "we had a pleasant evening together"; "a pleasant scene"; "pleasant sensations")

unpleasant (vs. pleasant) -- (disagreeable to the senses, to the mind, or feelings ; "an unpleasant personality"; "unpleasant repercussions"; "unpleasant odors")
        => acerb, acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic -- (harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique")
        => beastly, hellish, god-awful -- (very unpleasant; "hellish weather"; "stop that god-awful racket")
        => dour, forbidding, grim -- (harshly uninviting or formidable in manner or appearance; "a dour, self-sacrificing life"; "a forbidding scowl"; "a grim man loving duty more than humanity"; "undoubtedly the grimmest part of him was his iron claw"- J.M.Barrie)
        => dreadful -- (very unpleasant)
        => embarrassing, mortifying -- (causing to feel shame or chagrin or vexation; "the embarrassing moment when she found her petticoat down around her ankles"; "it was mortifying to know he had heard every word")
        => harsh, rough -- (unpleasantly stern; "wild and harsh country full of hot sand and cactus"; "the nomad life is rough and hazardous")
        => harsh -- (disagreeable to the senses; "the harsh cry of a blue jay"; "harsh cognac"; "the harsh white light makes you screw up your eyes"; "harsh irritating smoke filled the hallway")
        => hot -- (very unpleasant or even dangerous; "make it hot for him"; "in the hot seat"; "in hot water")
        => afflictive, painful, sore -- (causing misery or pain or distress; "it was a sore trial to him"; "the painful process of growing up")
        => rebarbative, repellent, repellant -- (serving or tending to repel; "he became rebarbative and prickly and spiteful"; "I find his obsequiousness repellent")
        => sharp, sharp-worded, tart -- (harsh; "sharp criticism"; "a sharp-worded exchange"; "a tart remark")
        => ungrateful -- (disagreeable; "I will not perform the ungrateful task of comparing cases of failure"- Abraham Lincoln)
        => unhappy -- (causing discomfort; "the unhappy truth")

Sense 2
pleasant -- ((of persons) having pleasing manners or behavior; "I didn't enjoy it and probably wasn't a pleasant person to be around")

INDIRECT (VIA nice) -> nasty, awful -- (offensive or even (of persons) malicious; "in a nasty mood"; "a nasty accident"; "a nasty shock"; "a nasty smell"; "a nasty trick to pull"; "Will he say nasty things at my funeral?"- Ezra Pound)

Similarity of adj pleasant

2 senses of pleasant

Sense 1
pleasant (vs. unpleasant) -- (affording pleasure; being in harmony with your taste or likings; "we had a pleasant evening together"; "a pleasant scene"; "pleasant sensations")
       => beautiful -- ((of weather) highly enjoyable; "what a beautiful day")
       => dulcet -- (extremely pleasant in a gentle way; "the most dulcet swimming on the most beautiful and remote beaches")
       => enjoyable, gratifying, pleasurable -- (affording satisfaction or pleasure; "the company was enjoyable"; "found her praise gratifying"; "full of happiness and pleasurable excitement"; "good printing makes a book more pleasurable to read")
       => grateful -- (affording comfort or pleasure; "the grateful warmth of the fire")
       => idyllic -- (suggestive of an idyll; charmingly simple and serene; "his idyllic life in Tahiti")
          Also See-> good-natured#1; nice#1; pleasing#1

Sense 2
pleasant -- ((of persons) having pleasing manners or behavior; "I didn't enjoy it and probably wasn't a pleasant person to be around")
       => nice (vs. nasty) -- (pleasant or pleasing or agreeable in nature or appearance; "what a nice fellow you are and we all thought you so nasty"- George Meredith; "nice manners"; "a nice dress"; "a nice face"; "a nice day"; "had a nice time at the party"; "the corn and tomatoes are nice today")