| No. | Item | Definition |
|---|---|---|
| 1. | acrostic | message from initial letters |
| 2. | alarm | a warning sound or signal |
| 3. | align | place in a straight line |
| 4. | anagram | letters rearranged into a word |
| 5. | assemble | put parts together |
| 6. | attempt | an effort to do something |
| 7. | battery | a device supplying power |
| 8. | beep | a short electronic sound |
| 9. | blacklight | a lamp for fluorescent effects |
| 10. | blueprint | a detailed technical plan |
| 11. | breakthrough | a sudden important advance |
| 12. | button | a small pressable control |
| 13. | cabinet | a cupboard with doors |
| 14. | chain | a series of linked rings |
| 15. | chamber | a room or enclosed space |
| 16. | cipher | a secret writing system |
| 17. | circuit | a complete electrical path |
| 18. | clue | a hint that helps solve something |
| 19. | code | a system of secret symbols |
| 20. | combination | a sequence that opens a lock |
| 21. | compartment | a separate enclosed section |
| 22. | compass | a tool showing direction |
| 23. | deadline | the latest allowed time |
| 24. | decode | convert from secret form |
| 25. | decoy | something meant to mislead |
| 26. | decrypt | make coded text readable |
| 27. | deduce | reach by reasoning |
| 28. | dial | a round control or face |
| 29. | discover | find something previously unknown |
| 30. | drawer | a sliding storage compartment |
| 31. | entry | a way in |
| 32. | exit | a way out |
| 33. | flashlight | a portable electric light |
| 34. | focus | concentrated attention |
| 35. | gear | a toothed rotating wheel |
| 36. | grid | a pattern of crossing lines |
| 37. | hinge | a joint for swinging |
| 38. | hint | a small helpful suggestion |
| 39. | hook | a curved catching piece |
| 40. | infer | conclude from evidence |
| 41. | inspect | examine closely |
| 42. | invisible ink | writing seen only under conditions |
| 43. | jigsaw | a puzzle of interlocking pieces |
| 44. | key | an object that opens a lock |
| 45. | keyhole | the opening for a key |
| 46. | latch | a fastening that holds shut |
| 47. | legend | a key explaining symbols |
| 48. | lens | a curved piece of glass |
| 49. | letter | a written alphabet character |
| 50. | lever | a bar used to lift |
| 51. | lock | a device secured by a key |
| 52. | logic | clear sensible reasoning |
| 53. | magnet | an object attracting metal |
| 54. | map | a drawing of an area |
| 55. | marker | an object used to indicate |
| 56. | maze | a confusing network of paths |
| 57. | mechanism | a working system of parts |
| 58. | memory | ability to remember things |
| 59. | message | information sent or left |
| 60. | mirror | a reflective surface |
| 61. | note | a short written message |
| 62. | number | a mathematical symbol or amount |
| 63. | observe | notice carefully |
| 64. | obstacle | something blocking progress |
| 65. | padlock | a portable lock with a shackle |
| 66. | panel | a flat section or board |
| 67. | passage | a way through somewhere |
| 68. | pattern | a repeated arrangement or design |
| 69. | phrase | a small group of words |
| 70. | portal | a doorway or entrance |
| 71. | press | push down firmly |
| 72. | prop | an object used in a setting |
| 73. | pulley | a wheel for lifting |
| 74. | puzzle | a problem designed to be solved |
| 75. | reason | think logically about something |
| 76. | reflection | an image in a mirror |
| 77. | reveal | make visible or known |
| 78. | riddle | a puzzling question or statement |
| 79. | rope | a thick strong cord |
| 80. | rotate | turn around a center |
| 81. | safe | a strong secure lockbox |
| 82. | search | look carefully for something |
| 83. | sequence | an ordered series of things |
| 84. | slide | move smoothly along a surface |
| 85. | solution | the correct answer to a problem |
| 86. | solve | find the answer |
| 87. | strategy | a plan for success |
| 88. | switch | a control that changes state |
| 89. | symbol | a mark representing something |
| 90. | tactic | a specific planned action |
| 91. | teamwork | cooperative effort by a group |
| 92. | timer | a device measuring time |
| 93. | token | a small symbolic object |
| 94. | trapdoor | a hidden door in floor |
| 95. | trial | a test or attempt |
| 96. | twist | turn with force |
| 97. | unlock | open by releasing a lock |
| 98. | walkie-talkie | a handheld two-way radio |
| 99. | wire | a thin metal strand |
| 100. | word | a unit of language |
