狭まる

1. Origins, structure, and basic meaning

• Structure: In 狭まる (せばまる), narrow 狭 plus change ending まる forms an intransitive verb for becoming narrower.
• Basic usage: 狭まる is intransitive and describes width, scope, or options becoming narrower.

2. Common pitfalls and similar expressions

• Intransitive 狭まる and transitive 狭める
  • Transitive 狭める instead presents an agent as narrowing them.