Ineffective vs. Ineffectual — What's the Difference?

Not producing an intended effect; ineffectual

Not producing the desired effect

Inadequate; incompetent

Lacking forcefulness or effectiveness; inadequate or incompetent

Not having the desired effect; ineffectual

Unable or insufficient to produce effect.

Lacking in ability; incompetent or inadequate

Worthless; ineffective.

Not effective; not having the desired effect; ineffectual; futile; inefficient; useless; as, an ineffective appeal; an ineffective herbal remedy.

Weak, indecisive; lacking forcefulness.

Not producing an intended effect;

Not producing the proper effect; without effect; inefficient; weak; useless; futile; unavailing; as, an ineffectual attempt; an ineffectual expedient.

Lacking in power or forcefulness;

Not sufficient to produce a desired result;

Lacking the ability or skill to perform effectively; inadequate;

Not producing an intended effect;

Producing no result or effect;

Lacking in power or forcefulness;