形容词

1. 不起作用的;无效果的;无效率的
If you say that something is ineffective, you mean that it has no effect on a process or situation.

1. lacking the ability or skill to perform effectively
inadequate

e.g. an ineffective administration
inefficient workers

Synonym: inefficient

2. not producing an intended effect

e.g. an ineffective teacher
ineffective legislation

Synonym: uneffectiveineffectual

3. lacking in power or forcefulness

e.g. an ineffectual ruler
like an unable phoenix in hot ashes

Synonym: ineffectualunable