ineffectual

mastery
UK /ˌɪnɪˈfɛkt͡ʃuəl/ US /ˌɪnəˈfɛkt͡ʃuəl/adj

card 1 of 1 · antonym

Which word is most opposite in meaning to **ineffectual** in the sentence below?

The ineffectual manager failed to motivate the team.