苦労【くろう】
trouble, hardship, difficulty, labour, labor, toil, pains, anxiety, worry, concern, cares
苦手【にがて】
poor (at), weak (in), not very good (at), not one's cup of tea, not one's favorite
苦しい【くるしい】
painful, difficult, tough, hard, distressing, (psychologically) difficult, stressful, awkward (e.g. position), straitened (circumstances), tight (financial situation), needy, struggling, strained (interpretation, explanation, etc.), lame (e.g. excuse), forced (e.g. smile), far-fetched, hard to do, unpleasant
苦しむ【くるしむ】
to suffer, to groan, to be worried
苦しみ【くるしみ】
pain, anguish, distress, suffering, hardship
苦しめる【くるしめる】
to torment, to pain, to inflict (physical) pain, to hurt, to harass, to cause (emotional) pain, to afflict, to distress, to bother, to trouble, to stump, to baffle
苦痛【くつう】
pain, agony, suffering, distress, torment
ご苦労【ごくろう】
trouble (I have put you through), (your) hard work, thank you (for your hard work), I appreciate your efforts
苦情【くじょう】
complaint, troubles, objection, grievance
苦戦【くせん】
hard fight, close game, struggle, tight contest
苦悩【くのう】
(mental) agony, anguish, suffering, distress
ご苦労さん【ごくろうさん】
I appreciate your efforts
苦い【にがい】
bitter
苦心【くしん】
pains, hard work, effort, trouble, labour, labor
苦笑い【にがわらい】
bitter smile, wry smile, forced smile, strained laugh
見苦しい【みぐるしい】
unsightly, ugly, unseemly, indecent, deplorable, disgraceful, shameful
苦笑【くしょう】
bitter smile, wry smile, strained laugh, sarcastic laugh
苦境【くきょう】
difficult situation, adverse circumstances, predicament, trouble, dilemma, distress
苦慮【くりょ】
racking one's brains, worrying oneself, being anxious
辛苦【しんく】
hardship, toil, trouble