► 形容動詞効果的 [こうかてき]
meaning: effective rank: 2☆ その
治療は余り効果的ではなかった ⇨ The treatment was not very effective
More examples:- この製品は初心者でも手軽且つ効果的に使うことが出来る ⇨ This product can be used easily and also effectively even by a beginner
- 似た意味の単語を連想して覚えるのは非常に効果的だ ⇨ It is very effective to learn similar words by associating them together