変動

1. Origins, structure, and basic meaning

• Structure: 変動 is read へんどう and means change or fluctuation in prices, temperatures, or conditions.
• Basic usage: In 天候によって野菜の価格が大きく変動する。, vegetable prices fluctuate greatly with the weather.

2. Common pitfalls and similar expressions

• Fluctuation versus an increase
  • 価格が大きく変動する means prices change substantially, not necessarily that they rise. 変動 does not by itself specify the direction of change.