ineffectual

1. ADJ If someone or something is ineffectual, they fail to do what they are expected to do or are trying to do. 無能的; 無效的

The mayor had become ineffectual in the struggle to clamp down on drugs. 該市長在打擊毒品的斗爭中行動不力。

2. ineffectuallyADV 無效地

Her voice trailed off ineffectually. 她的聲音漸漸微弱得聽不見了。