雨曇り

1. Origins, structure, and basic meaning

• Structure: 雨曇り(あまぐもり) means heavily overcast weather or a sky that looks like rain.
• Basic usage: It is used for a morning that has looked rainy and overcast or a sky that prompts a change of plans. Typical patterns are 朝から雨曇りだ and 雨曇りの空.

2. Common pitfalls and similar expressions

• Use the correct linking form
  • Use 雨曇りだ・で in a predicate and 雨曇りの空 with の before a noun.
• Difference from 曇り
  • 曇り(くもり) broadly means cloudy weather, while 雨曇り particularly suggests cloudiness that threatens rain.