雨雲

1. Origins, structure, and basic meaning

• Structure: 雨雲, read あまぐも, has rain 雨 modify cloud 雲 to denote a rain-bearing cloud.
• Basic usage: It denotes a cloud carrying or producing rain, as in 雨雲が近づく.

2. Common pitfalls and similar expressions

• Scope and context
  • It does not mean every dark-colored cloud; the connection with rain is central.