Synonyms for Most unnerving:

• adj.

  •appalling (adjective)
  • frightful,
  • petrifying,
  • formidable,
  • dire,
  • Scaring,
  • heavy,
  • alarming,
  • harrowing,
  • horrible,
  • hideous,
  • shocking,
  • awful,
  • intimidating,
  • astounding,
  • gross,
  • unnerving,
  • grody,
  • daunting,
  • frightening,
  • terrible,
  • disheartening,
  • bad,
  • dreadful,
  • dismaying,
  • the end,
  • horrid,
  • fearful,
  • grim,
  • ghastly,
  • terrifying,
  • horrific,
  • mean.
  •disquieting (adjective)
  • unsettling,
  • worrying,
  • annoying,
  • distressing,
  • bothersome,
  • troublesome,
  • irritating,
  • vexing,
  • disconcerting,
  • troubling,
  • perturbing,
  • disturbing,
  • perplexing.
  •frightful/frightening (adjective)
  • gruesome,
  • dread,
  • spooky,
  • fearsome,
  • atrocious,
  • repellent,
  • direful,
  • horrifying,
  • grabber,
  • chilling,
  • hair-raising,
  • grisly,
  • appalling,
  • portentous,
  • disquieting,
  • hairy,
  • unspeakable,
  • menacing,
  • ominous,
  • lurid,
  • horrendous,
  • morbid,
  • traumatic,
  • inconceivable,
  • macabre,
  • awesome.
  •nightmarish (adjective)
  • scary,
  • creepy,
  • hellish,
  • eerie,
  • ghoulish.
  •scary (adjective)
  • spine-chilling,
  • bloodcurdling.
  •terrible (adjective)
  • inconvenient,
  • vile,
  • beastly,
  • hateful,
  • offensive,
  • loathsome,
  • dreaded,
  • odious,
  • poor,
  • dangerous,
  • monstrous,
  • disastrous,
  • revolting,
  • unfortunate,
  • unpleasant,
  • severe,
  • obnoxious,
  • awe-inspiring,
  • serious,
  • extreme,
  • rotten,
  • desperate,
  • unwelcome,
  • repulsive,
  • abhorrent.
  •worrisome (adjective)
  • trying,
  • tiresome,
  • agonizing,
  • upsetting,
  • anxious,
  • uneasy,
  • apprehensive,
  • Irksome,
  • taxing,
  • burdensome,
  • wearisome,
  • nervous.

Antonyms for Most unnerving:

• adj.

  • appalling
    comforting, wonderful, beautiful, encouraging, calming, polite, nice, satisfying, delightful, reassuring, pleasing, good, pleasant.
  • disquieting
    soothing, settling.
  • nightmarish
    normal.
  • terrible
    inoffensive, fortunate, great, unimportant, mild, lucky, happy, trivial.