効果(こうか)

こうか
noun
effect, result, effectiveness
See also: 高価(こうか) (expensive), 硬貨(こうか) (coin)
1. effect, result
The outcome or result of an action.
効果(こうか)がない。
It has no effect.
薬(くすり)の効果(こうか)が出(で)てきた。
The medicine is starting to take effect.
この運動(うんどう)を続(つづ)ければ、ダイエットの効果(こうか)が出(で)るはずだ。
If you keep up this exercise, you should see results from the diet.
2. effectiveness, efficacy
The degree to which something produces the desired result.
効果(こうか)的(てき)な方法(ほうほう)
An effective method.
この薬(くすり)はとても効果(こうか)的(てき)だ。
This medicine is very effective.
効果(こうか)的(てき)に勉強(べんきょう)するには、まず計画(けいかく)を立(た)てることが大切(たいせつ)だ。
To study effectively, the first important thing is to make a plan.

効果(こうか) means effect, result, or effectiveness. Used broadly for the outcomes of actions, treatments, policies, and methods.

COMMON PATTERNS:

  • 効果(こうか)がある: to have an effect
  • 効果(こうか)が出(で)る: the effect appears/shows
  • 効果(こうか)がない: to have no effect
  • 効果(こうか)的(てき)（な）: effective
  • 効果(こうか)的(てき)に: effectively

COMPOUNDS:

  • 逆(ぎゃく)効果(こうか): counterproductive effect, backfire
  • 相乗(そうじょう)効果(こうか): synergistic effect
  • 副作用(ふくさよう): side effect
  • 温室(おんしつ)効果(こうか): greenhouse effect
  • 音響(おんきょう)効果(こうか): sound effects

SIMILAR WORDS:

  • 結果(けっか): result, outcome (neutral — what happened)
  • 効果(こうか): effect (implies intended or desired result)
  • 影響(えいきょう): influence, impact (broader, can be positive or negative)

Related Words

Synonym: 結果(けっか) (result, outcome)
Synonym: 影響(えいきょう) (influence, impact)
general
Added 2026.1.11 16:28 · Revised 2026.4.6 15:23
02500/02726_kouka