蒸れる

1. Origins, structure, and basic meaning

• Structure: 蒸れる (むれる) adds okurigana れる to steam or humidity 蒸, forming an intransitive verb.
• Basic usage: It describes heat and moisture building up inside clothing or shoes until they feel hot and damp.

2. Common pitfalls and similar expressions

• Becoming stuffy rather than steaming food
  • 蒸れる presents an enclosed condition developing, not an agent deliberately cooking something with steam.