便利

1. Origins, structure, and basic meaning

• Structure: 便利 is read as べんり and is an adjectival noun meaning convenient or useful because something makes a task or daily life easier.
• Basic usage: Use 買い物に便利だ for being convenient for shopping and 便利な道具 for a useful, convenient tool.

2. Common pitfalls and similar expressions

• Difference between 便利 and 簡単
  • The former says that a place or tool is useful for a purpose, whereas the latter says that a method or problem is simple or not difficult.