| No. | Item | Definition |
|---|---|---|
| 1. | absorbed | deeply engaged and intent |
| 2. | adamant | firm and unyielding in purpose |
| 3. | all in | fully committed and sincere |
| 4. | ardent | passionate and deeply sincere |
| 5. | assiduous | showing persistent serious effort |
| 6. | attentive | carefully focused and serious |
| 7. | austere | severely simple and serious |
| 8. | authentic | genuine and sincerely felt |
| 9. | bent | strongly determined toward something |
| 10. | bona fide | genuine and sincere |
| 11. | bound and determined | firmly resolved to act |
| 12. | businesslike | serious and efficient in manner |
| 13. | calm | quietly serious and steady |
| 14. | candid | honest and straightforwardly sincere |
| 15. | committed | strongly dedicated and sincere |
| 16. | composed | calm and serious |
| 17. | conscientious | careful, responsible, and sincere |
| 18. | considered | carefully thought out and serious |
| 19. | constant | steady and faithful in purpose |
| 20. | contemplative | given to serious thought |
| 21. | dedicated | devoted with serious purpose |
| 22. | deep | profound and serious |
| 23. | deeply felt | sincerely and strongly experienced |
| 24. | deliberate | careful and purposeful, not casual |
| 25. | determined | showing firm serious purpose |
| 26. | devout | deeply sincere and committed |
| 27. | dignified | calm, serious, and worthy |
| 28. | dutiful | serious about obligations |
| 29. | engaged | seriously involved and attentive |
| 30. | faithful | loyal, true, and sincere |
| 31. | fervent | showing intense sincere feeling |
| 32. | firm | strong and serious in purpose |
| 33. | focused | directing serious attention |
| 34. | for real | genuinely serious or true |
| 35. | formal | serious rather than casual |
| 36. | frank | open, direct, and sincere |
| 37. | from the heart | with genuine sincere feeling |
| 38. | genuine | real and sincerely meant |
| 39. | grave | serious and weighty in manner |
| 40. | grim | stern and serious |
| 41. | guileless | sincere and without deceit |
| 42. | heartfelt | deeply and genuinely felt |
| 43. | high-minded | noble and morally serious |
| 44. | honest | genuine and straightforward |
| 45. | idealistic | guided by sincere ideals |
| 46. | inspired | filled with sincere purpose |
| 47. | intense | very strong and serious |
| 48. | intent | firmly focused and serious |
| 49. | intentional | done with clear serious purpose |
| 50. | intentive | closely attentive and serious |
| 51. | keen | eager and seriously interested |
| 52. | levelheaded | calm, sensible, and serious |
| 53. | loyal | steadfast and devoted |
| 54. | meaningful | having serious sincere intent |
| 55. | measured | careful, controlled, and serious |
| 56. | meditative | deeply thoughtful and serious |
| 57. | methodical | orderly and serious in approach |
| 58. | mindful | aware, careful, and serious |
| 59. | motivated | moved by serious purpose |
| 60. | no-nonsense | serious and practical |
| 61. | noble-minded | having elevated sincere ideals |
| 62. | not joking | completely serious, not playful |
| 63. | openhearted | warmly sincere and frank |
| 64. | passionate | showing strong sincere feeling |
| 65. | pious | sincerely religious or devout |
| 66. | plainspoken | direct and sincere in speech |
| 67. | prayerful | showing sincere spiritual seriousness |
| 68. | principled | guided by sincere moral standards |
| 69. | professional | serious, competent, and proper |
| 70. | profound | very deep and serious |
| 71. | purposeful | having firm serious purpose |
| 72. | real | genuine and not pretended |
| 73. | reflective | thoughtful and serious |
| 74. | resolute | firmly determined and serious |
| 75. | resolved | firmly determined and serious |
| 76. | responsible | serious and dependable in conduct |
| 77. | restrained | controlled and serious in manner |
| 78. | reverent | deeply respectful and sincere |
| 79. | rigorous | very thorough and serious |
| 80. | serious | showing deep thought or concern |
| 81. | sincere | genuine and honest in feeling |
| 82. | sober | serious and restrained |
| 83. | solemn | grave and deeply sincere |
| 84. | somber | darkly serious in tone |
| 85. | staunch | firmly loyal and sincere |
| 86. | steadfast | firm and sincere in purpose |
| 87. | straightforward | direct, honest, and sincere |
| 88. | studious | serious and attentive in effort |
| 89. | tenacious | holding firmly with determination |
| 90. | thoughtful | showing careful serious consideration |
| 91. | true | genuine and faithful to fact |
| 92. | truthful | honest and sincere |
| 93. | unfeigned | genuine, not pretended |
| 94. | unshakable | not easily moved from purpose |
| 95. | unwavering | steady and firm in purpose |
| 96. | unyielding | not giving way; firm |
| 97. | upright | morally honest and sincere |
| 98. | wholehearted | fully sincere and enthusiastic |
| 99. | workmanlike | serious and competent |
| 100. | zealous | full of eager sincere devotion |