利用

1. Origins, structure, and basic meaning

• Structure: 利用 is read りよう and means using a facility or resource for a purpose.
• Basic usage: 利用する describes using something, while 利用できる expresses its availability for use.

2. Common pitfalls and similar expressions

• Resource and purpose
  • In 雨水を水やりに利用する, を marks the resource and に marks its purpose. Swapping the particles changes that relationship.
• Emphasis on use
  • 使う is the everyday verb for using something; 利用する suits contexts about making use of facilities, opportunities, or resources.