乾燥

1. Origins, structure, and basic meaning

• Structure: 乾燥 is a noun read かんそう for drying or dryness and is also used as 乾燥する.
• Basic usage: It distinguishes something becoming dry from a person deliberately drying a material.
  • 冬は空気が乾燥しやすいので、部屋に加湿器を置きます。 concerns winter air tending to dry out; 洗ったハーブを日陰で十分に乾燥させました。 describes thoroughly drying washed herbs in the shade.

2. Common pitfalls and similar expressions

• が乾燥する and を乾燥させる
  • Mark what becomes dry with が; with causative 乾燥させる, mark what someone dries with を.
• 乾燥しやすい
  • しやすい indicates a tendency to become dry. It does not state that the air is always completely dry.
• 乾燥する and 乾く
  • 乾く(かわく) is an everyday verb for something drying, while 乾燥する more formally covers a state, process, or deliberate drying treatment.