| 542 | A Guide To Reading and Writing Japanese (Florence Sakade) | 
| 639 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) | 
| 610 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) | 
| 309 | A New Dictionary of Kanji Usage | 
| 720 | Classic Nelson (Andrew Nelson) | 
| 274 | Essential Kanji (P.G. O’Neill) | 
| 369 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) | 
| 491A | Japanese Names (P.G. O’Neill) | 
| 233 | Kanji and Kana (Spahn and Hadamitzky) | 
| 233 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) | 
| 443 | Kanji in Context (Nishiguchi and Kono) | 
| 214 | Kodansha Compact Kanji Guide | 
| 3155 | Kodansha Kanji Dictionary (Jack Halpern) | 
| 1619 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) | 
| 2205 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) | 
| 868 | Les Kanjis dans la tete (Yves Maniette) | 
| 2329 | Morohashi | 
| 2548 | New Japanese English Character Dictionary (Jack Halpern) | 
| 531 | New Nelson (John Haig) | 
| 860 | Remembering The Kanji (James Heisig) | 
| 924 | Remembering The Kanji, 6th edition (James Heisig) | 
| 145 | The Kanji Way to Japanese Language Power (Dale Crowley) | 
| 494 | Tuttle Kanji Cards (Alexander Kask) | 
      Jōyō kanji, taught in grade 4
    
    
      JLPT level N3
    
    
      398 of 2500 most used kanji in newspapers
    
Stroke order
On reading compounds
- 労 【ロウ】 labor, labour, toil, trouble, pains, work, effort, striving
 - 労組 【ロウソ】 labor union, labour union, trade union
 - 国労 【コクロウ】 National Railway Workers Union
 - 功労 【コウロウ】 meritorious deed, services
 
Kun reading compounds
- 労する 【ろうする】 to work, to labor, to labour, to put to work, to make (someone) work
 - 労る 【いたわる】 to pity, to sympathize with, to sympathise with, to treat with sympathy, to console, to be kind to, to tend to (e.g. an injury), to care for, to nurse, to soothe, to appreciate, to recognize (someone's efforts), to reward for
 - 労き 【いたずき】 pain, trouble, illness
 - 労い 【ねぎらい】 expression of appreciation (for someone's efforts), thanks
 - 労う 【ねぎらう】 to show appreciation for (efforts, esp. by someone of equal or lower status), to thank for, to reward for
 - 労う 【ねぎらう】 to show appreciation for (efforts, esp. by someone of equal or lower status), to thank for, to reward for
 
Readings
- Korean:
 - ro
 
Spanish
- trabajo duro
 - cansancio
 - compensación
 
Portuguese
- trabalho
 - agradecer
 - recompensar
 - dificuldade
 
French
- labeur
 - remerciement pour
 - récompense pour
 - être plein d'attentions
 - soucis
 
| 945 | 2001 Kanji | 
| 3n4.3 | The Kanji Dictionary | 
| 2-5-2 | SKIP code | 
| 2-3-4 | SKIP code | 
| 3242.7 | Four corner code | 
| 9042.7 | Four corner code | 
| 1-47-11 | JIS X 0208-1997 kuten code | 
| 52b4 | Unicode hex code | 
      suffering, trial, worry, hardship, feel bitter, scowl
    
    
  
      Jōyō kanji, taught in grade 3
    
    
      JLPT level N3
    
    
      623 of 2500 most used kanji in newspapers
    
Stroke order
On reading compounds
- 苦 【ク】 pain, anguish, suffering, distress, anxiety, worry, trouble, difficulty, hardship, duhkha (suffering)
 - 苦境 【クキョウ】 difficult situation, adverse circumstances, predicament, trouble, dilemma, distress
 - 生活苦 【セイカツク】 hardships of life (esp. due to lack of money), life's struggles
 - 病苦 【ビョウク】 pain of sickness
 
Kun reading compounds
- 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
 - 苦しい言い訳 【くるしいいいわけ】 lame excuse, poor excuse
 - 苦しむ 【くるしむ】 to suffer, to groan, to be worried
 - 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
 - 苦い 【にがい】 bitter
 - 苦い薬 【にがいくすり】 bitter medicine
 - 苦る 【にがる】 to feel bitter, to scowl
 
Readings
- Korean:
 - go
 
Spanish
- sufrimiento
 - pena
 - doloroso
 - penoso
 - trabajoso
 - amargo
 
Portuguese
- sofrimento
 - experiência
 - preocupar
 - dificuldade
 - sentir- se amargo
 - tristeza
 
French
- souffrir
 - peine
 - affliction
 - souci
 - amer
 - renfrogné
 
| 197 | A Guide To Reading and Writing Japanese (Florence Sakade) | 
| 283 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) | 
| 264 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) | 
| 597 | A New Dictionary of Kanji Usage | 
| 3928 | Classic Nelson (Andrew Nelson) | 
| 264 | Essential Kanji (P.G. O’Neill) | 
| 864 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) | 
| 687 | Japanese Names (P.G. O’Neill) | 
| 545 | Kanji and Kana (Spahn and Hadamitzky) | 
| 554 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) | 
| 342 | Kanji in Context (Nishiguchi and Kono) | 
| 646 | Kodansha Compact Kanji Guide | 
| 2789 | Kodansha Kanji Dictionary (Jack Halpern) | 
| 1433 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) | 
| 1932 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) | 
| 230 | Les Kanjis dans la tete (Yves Maniette) | 
| 30797P | Morohashi | 
| 2243 | New Japanese English Character Dictionary (Jack Halpern) | 
| 5009 | New Nelson (John Haig) | 
| 225 | Remembering The Kanji (James Heisig) | 
| 239 | Remembering The Kanji, 6th edition (James Heisig) | 
| 344 | The Kanji Way to Japanese Language Power (Dale Crowley) | 
| 295 | Tuttle Kanji Cards (Alexander Kask) | 
| 1977 | 2001 Kanji | 
| 3k5.24 | The Kanji Dictionary | 
| 2-3-5 | SKIP code | 
| 4460.4 | Four corner code | 
| 1-22-76 | JIS X 0208-1997 kuten code | 
| 82e6 | Unicode hex code |