adjective🔗Share効果のない, 無効なNot having the desired effect; ineffectual"The bug spray was ineffective; the mosquitoes were still biting us. "殺虫剤は効果がなく、蚊はまだ私たちを刺していました。outcomeabilityfunctionqualityChat with AIVocabulary GamePractice Reading
adjective🔗Share無能な, 効果のない, 不十分なLacking in ability; incompetent or inadequate"The new student found the teacher's explanation of the math problem completely ineffective; she still didn't understand it. "新しい生徒は、先生の数学の問題の説明が全く効果がないと感じました。彼女はまだ理解していません。abilityqualitycharacterfunctionChat with AIVocabulary GamePractice Reading
