効果

1. Origins, structure, and basic meaning

• Structure: 効果 is the noun こうか, meaning the effect produced by something such as medicine or an action.
• Basic usage: In 薬の効果が現れ、熱が少し下がった。, the medicine has taken effect and the fever has dropped slightly.

2. Common pitfalls and similar expressions

• An effect appearing or increasing
  • In 効果が現れ and 効果が高まる, the effect is the subject that appears or increases. Read the noun 効果 together with the following verb.