ineffective
adjective
1. not producing an intended effect
- an ineffective teacher
- ineffective legislation
Similar word(s): idle, toothless, unproductive, inefficacious, inefficient, powerless, useless, ineffectual, uneffective
2. lacking in power or forcefulness
- an ineffectual ruler
Similar word(s): impotent, ineffectual, unable
3. lacking the ability or skill to perform effectively; inadequate
- an ineffective administration
Similar word(s): incompetent, inefficient