• 苦いにがい

  bitter

• 苦味にがみ

  bitterness, bitter taste

• 苦難くなん

  suffering, distress, hardship, trial

• 苦痛くつう

  pain, agony, suffering, distress, torment

• 苦悩くのう

  (mental) agony, anguish, suffering, distress

• 苦情くじょう

  complaint, troubles, objection, grievance

• 苦心くしん

  pains, hard work, effort, trouble, labour, labor

• 苦戦くせん

  hard fight, close game, struggle, tight contest

• 苦笑くしょう

  bitter smile, wry smile, strained laugh, sarcastic laugh

• 苦慮くりょ

  racking one's brains, worrying oneself, being anxious

• 苦言くげん

  candid advice, frank advice, honest opinion, exhortation, harsh but honest advice

• 苦手にがて

  poor (at), weak (in), not very good (at)

• 苦渋くじゅう

  bitterness, distress, pain, anguish, affliction

• 苦労くろう

  trouble, hardship, difficulty, labour, labor, toil, pains

• 苦境くきょう

  difficult situation, adverse circumstances, predicament, trouble, dilemma, distress

• 辛苦しんく

  hardship, toil, trouble

• 病苦びょうく

  pain of sickness

• 苦しむくるしむ

  to suffer, to groan, to be worried

• 苦笑いにがわらい

  bitter smile, wry smile, forced smile, strained laugh

• 苦しみくるしみ

  pain, anguish, distress, suffering, hardship

• 苦しいくるしい

  painful, difficult, tough, hard

• 苦肉の策くにくのさく

  last resort, desperate measure taken under the pressure of necessity

• 苦しめるくるしめる

  to torment, to pain, to inflict (physical) pain, to hurt

• 無茶苦茶むちゃくちゃ

  nonsensical, unreasonable, absurd, unrealistic

• 重苦しいおもくるしい

  heavy (feeling, etc.), gloomy (weather, etc.), oppressive (atmosphere, etc.), stifling, strained

• 見苦しいみぐるしい

  unsightly, ugly, unseemly, indecent, deplorable, disgraceful, shameful

• 寝苦しいねぐるしい

  unable to sleep well

• 滅茶苦茶めちゃくちゃ

  absurd, unreasonable, nonsensical, preposterous, incoherent

• ご苦労様ごくろうさま

  thank you (for your hard work), I appreciate your efforts

• 苦く

  pain, anguish, suffering, distress, anxiety, worry, trouble, difficulty, hardship

• 苦悶くもん

  anguish

• 苦力クーリー

  coolie

• 苦熱くねつ

  intense heat

• 苦味くみ

  bitterness, bitter taste

• 苦土くど

  magnesia, magnesium oxide

• 苦さにがさ

  bitterness, bitter taste

• 苦諦くたい

  truth of suffering

• 苦参くらら

  Sophora flavescens

• 苦るにがる

  to feel bitter, to scowl

• 苦茗くめい

  bitter tea, low-quality tea

• 苦虫にがむし

  bitter-tasting bug

• 苦厄くやく

  hardship and misfortune

• 苦汁くじゅう

  bitter liquid, bitter experience

• 苦海くかい

  sea of suffering, human realm

• 苦闘くとう

  hard fight, difficult struggle

• 苦楽くらく

  pleasure and pain, joys and sorrows

• 苦衷くちゅう

  distress, anguish, mental suffering

• 苦杯くはい

  bitter cup, bitter experience, bitter defeat, ordeal

• 苦肉くにく

  hurting oneself (to trick an adversary)

• 苦界くがい

  world of suffering