efficacious
🇺🇸
/ˌefɪˈkeɪʃəs/
🇬🇧
/ˌefɪˈkeɪʃəs/
adjective
R
works well and produces the result you wanted
Drinking a lot of water is efficacious for staying hydrated.
たくさんの水を飲むことは水分補給に効果的です。
translation
効果的