Synonyms for Most disheartening:

• adj.

  •appalling (adjective)
  • fearful,
  • grody,
  • dreadful,
  • harrowing,
  • shocking,
  • daunting,
  • formidable,
  • terrible,
  • frightening,
  • awful,
  • astounding,
  • intimidating,
  • alarming,
  • hideous,
  • gross,
  • bad,
  • mean,
  • horrible,
  • frightful,
  • terrifying,
  • heavy,
  • dire,
  • grim,
  • the end,
  • horrific,
  • horrid,
  • ghastly,
  • dismaying,
  • Scaring,
  • petrifying,
  • unnerving,
  • disheartening.
  •bleak (adjective)
  • drear,
  • gloomy,
  • hard,
  • hopeless,
  • melancholy,
  • joyless,
  • harsh,
  • funereal,
  • lonely,
  • black,
  • dark,
  • cheerless,
  • sad,
  • comfortless,
  • unpromising,
  • mournful,
  • oppressive,
  • dismal,
  • discouraging,
  • somber,
  • dreary.
  •depressing (adjective)
  • heartbreaking,
  • saddening,
  • bleak,
  • distressing,
  • melancholic,
  • Dejecting,
  • dispiriting.
  •disappointing (adjective)
  • frustrating,
  • failing,
  • unfulfilling,
  • distasteful,
  • lame,
  • mediocre,
  • unpleasant,
  • insufficient,
  • disconcerting,
  • uninteresting,
  • ineffective,
  • bitter,
  • inadequate,
  • falling short,
  • inferior,
  • unsatisfying.
  •discouraging (adjective)
  • disappointing,
  • Deterring,
  • off-putting,
  • disadvantageous,
  • unfavorable,
  • dampening,
  • depressive,
  • inopportune,
  • unpropitious,
  • repressing,
  • depressing,
  • hindering,
  • Dissuading.
  •dismal (adjective)
  • doleful,
  • unhappy,
  • disagreeable,
  • lonesome,
  • sorrowful,
  • desolate,
  • dolorous,
  • tedious,
  • dull,
  • cloudy,
  • boring,
  • murky,
  • afflictive,
  • lugubrious,
  • inauspicious,
  • depressed,
  • overcast,
  • miserable,
  • forlorn,
  • tenebrous,
  • lowering,
  • despondent,
  • gruesome,
  • in the pits,
  • morbid,
  • monotonous,
  • frowning,
  • dingy,
  • unfortunate,
  • shadowy,
  • troublesome,
  • dim.
  •dispiriting (adjective)
  • crushing,
  • demoralizing.
  •frightening (adjective)
  • rebarbative,
  • redoubtable.
  •funereal (adjective)
  • deathlike,
  • elegiac,
  • woeful,
  • solemn,
  • serious,
  • sepulchral,
  • dirgelike,
  • lamenting,
  • grave.
  •gloomy (adjective)
  • cold,
  • acherontic,
  • dusky,
  • disconsolate,
  • morose,
  • tenebrific,
  • acheronian,
  • drab.
  •sad (adjective)
  • moving,
  • pitiful,
  • poignant,
  • shabby,
  • tragic,
  • sorry,
  • regrettable,
  • pitiable,
  • tearful,
  • calamitous,
  • hapless,
  • deplorable,
  • Discomposing,
  • disastrous,
  • tear-jerking,
  • upsetting,
  • wretched,
  • lamentable,
  • lachrymose,
  • heart-rending,
  • pathetic.

Antonyms for Most disheartening:

• adj.

  • appalling
    good, wonderful, pleasing, encouraging, reassuring, beautiful, delightful, pleasant, satisfying, polite, calming, nice, comforting.
  • bleak
    comfortable, hopeful, light, glad, congenial, happy, sunny, appealing, bright, cheerful, joyful.
  • depressing
    cheering, exhilarating.
  • disappointing
    satisfactory, agreeable, strong.
  • discouraging
    heartening, inspiriting, auspicious, favorable, inspiring.
  • dismal
    smart, clear, luminous, intelligent.
  • funereal
    lively, upbeat.
  • gloomy
    content, uplifting, animated, vivacious, encouraged, sparkling.
  • off
    on, here, present.
  • oppressive
    easy, cool, mild, gentle, temperate, Relieving, calm, kind.
  • sad
    fortunate, blessed, right, great, unaffecting, worthwhile, advantageous, lucky.