結露

1. Origins, structure, and basic meaning

• Structure: 結露, read けつろ, is a noun for condensation, the formation of moisture on a cool surface.
• Basic usage: The surface appears in 窓ガラスに結露が生じる, while the prevented phenomenon appears in 結露を防ぐ.

2. Common pitfalls and similar expressions

• Process versus droplet
  • 結露 names the phenomenon of moisture collecting on a surface, rather than one individual drop of water.
• Surface and object of prevention
  • に marks where condensation forms, whereas を marks the phenomenon that an action seeks to prevent.