長い

1. Origins, structure, and basic meaning

• Structure: 長い (ながい) is an adjective for great extent in distance or time. The examples use a present judgment and a past attributive form.
• Basic usage: The route to a station is longer than expected; a meeting that lasted a long time finally ends.

2. Common pitfalls and similar expressions

• Long spatial route and meeting long in duration
  • 道は…長い judges travel distance, while 長かった会議 uses a past form for the duration of a meeting that has ended. Separate spatial length from elapsed time.