1.
immediate effectiveness, quick-acting quality
The quality of producing results immediately or very quickly. Used for medicines, treatments, methods, and strategies that work right away.
この薬は即効性がある。
This medicine is fast-acting.
即効性のある対策が求められている。
Measures with immediate effectiveness are being sought.
この方法には即効性はないが、長期的に見れば効果がある。
This method doesn't produce immediate results, but it is effective in the long term.
USAGE:
Commonly used to describe medicines, treatments, or strategies. The pattern 即効性がある/ない (has/lacks immediate effect) is the most frequent usage.
RELATED WORDS:
- 即効: immediate effect (the base word without ～性)
- 速効: same meaning, alternate kanji
COMMON COLLOCATIONS:
- 即効性がある: to be fast-acting
- 即効性のある薬: a quick-acting medicine
- 即効性に欠ける: to lack immediate effectiveness