고민苦悶 worry; anguish 고생苦生 trouble; hardship 고통苦痛 pain 학수고대鶴首苦待 looking forward to; waiting eagerly for 각고刻苦 hard work; difficult labor; backbreaking work 고갈苦渴 extreme thirst 고난苦難 hardship; trouble; suffering; difficulty; adversity; trial; ordeal 고뇌苦惱 anguish; agony 고대苦待 eager waiting 고락苦樂 sorrows and joys 고배苦杯 experience of failure 고생고생苦生苦生 painstakingly 고생고생苦生苦生 painstakingly 고생문苦生門 future trouble; trouble in the future 고소苦笑 bitter smile 고심苦心 consideration; contemplation; deliberation 고역苦役 toil; drudgery 고육지계苦肉之計 desparate measure; desparate plan 고육지책苦肉之策 desperate measure; desperate plan 고전苦戰 tough game; fighting hard 고진감래苦盡甘來 sweetness after bitterness; no pain, no gain 고초苦楚 hardship 고충苦衷 difficulty; problem 고투苦鬪 struggle 고학苦學 working while studying to earn school expenses 고학생苦學生 student who works while studying to earn school expenses 고해苦海 this world; secular world 고행苦行 penance; asceticism; mortification 노고勞苦 labor 동고동락同苦同樂 sharing one's sorrows and joys 민생고民生苦 economic plight of the people 병고病苦 suffering from a sickness 산고産苦 labor pain; birth pangs 삼중고三重苦 triple handicap; triple whammy 생고생生苦生 trouble 생활고生活苦 financial difficulties; economic distress 악전고투惡戰苦鬪 desperate fight; hard battle; close game 옥고獄苦 hardships of prison life 이중고二重苦 double whammy 인고忍苦 endurance; perseverance 천신만고千辛萬苦 experience of all difficulties