time

1. Origins, structure, and basic meaning

• Structure: 時 has 10 strokes; 時間 is read じかん, and 時計 is read とけい.
• Basic usage: 時間 denotes a duration or time devoted to an activity; 時計 denotes a clock or watch.

2. Common pitfalls and similar expressions

• An amount of time and a clock
  • 出発までまだ一時間ある means that one hour remains before departure. 読書の時間 refers to time spent reading rather than a specified number of hours.
  • 壁の時計 is a clock on a wall. 時計 has the whole-word reading とけい; the じ in 時間 is not inserted into it.