ineffectual
/ˌɪnɪˈfektjʊəl/adjective
1- not producing any or the desired effect不起作用的; 无效的：
an ineffectual campaign.
一场无效的战役。
1.1
- (of a person) lacking the ability or qualities to cope with a role or situation（人）不能胜任的; 无能的：
she was neglectful and ineffectual as a parent.
作为家长她是疏忽而且不能胜任的。
派生词
ineffectuality
nounineffectually
adverbineffectualness
noun词源