基礎

1. Origins, structure, and basic meaning

• Structure: 基礎, read きそ, means the underlying basics of knowledge or skills, or the foundation supporting a building.
• Basic usage: It is used when learning the basics of grammar or inspecting a building's foundation.
  • まず文法の基礎を身につけてから長文を読む。

2. Common pitfalls and similar expressions

• Acquiring and strengthening the basics
  • 基礎を身につける means acquiring the basics, while 基礎を固める means strengthening that foundation.