What is "nerve-racking nerve-wracking stressful trying"

Ill-natured \Ill`-na"tured\, a.

1. Of habitual bad temper; having an unpleasant disposition; surly; disagreeable; cross; peevish; fractious; crabbed; -- of people; as, an ill-natured person; an ill-natured disagreeable old man. Opposite of good-natured. [Narrower terms: argumentative, contentious, disputatious, disputative, litigious : {atrabilious, bilious, dyspeptic, liverish : {bristly, prickly, snappish, splenetic, waspish : {cantankerous, crotchety, ornery : {choleric, irascible, hotheaded, hot-headed, hot-tempered, quick-tempered, short-tempered : {crabbed, crabby, cross, fussy, fussbudgety, grouchy, grumpy, bad-tempered, ill-tempered: cranky, fractious, irritable, peevish, peckish, pettish, petulant, testy, tetchy, techy : {crusty, curmudgeonly, gruff, ill-humored, ill-humoured: dour, glowering, glum, moody, morose, saturnine, sour, sullen : {feisty, touchy : {huffish, sulky: misanthropic, misanthropical : {misogynous : {shirty, snorty ill-tempered or annoyed): shrewish, nagging, vixenish : {surly, ugly ] Also See: {unpleasant.

2. Dictated by, or indicating, ill nature; spiteful. ``The ill-natured task refuse.''
   --Addison.

3. Intractable; not yielding to culture. [R.] ``Ill-natured land.''
   --J. Philips.

   3. not to one's liking; unpleasant; disagreeable. Opposite of agreeable. [WordNet sense 2] [Narrower terms: annoying, galling, chafing, irritating, nettlesome, pesky, pestiferous, pestilent, plaguy, plaguey, teasing, vexatious, vexing; nerve-racking, nerve-wracking, stressful, trying ]

   Syn: disagreeable. [WordNet 1.5] -- {Ill`-na"tured*ly, adv. -- Ill`-na"tured*ness, n.