関係

1. Origins, structure, and basic meaning

• Structure: 関係 is read as かんけい and is a noun for a relationship or connection between people, things, or phenomena.
• Basic usage: A relationship between people appears in 信頼関係を築く, while a connection between phenomena appears in 気温と成長の関係.

2. Common pitfalls and similar expressions

• People and phenomena
  • It covers interpersonal relationships as well as links involving causes, conditions, or changes.
• Difference from 関連
  • 関連 often marks a connection among topics, information, or events; 関係 is broader and also naturally covers relations between people.