A comparative for the word ineffectual is more ineffectual.

The word ineffectual is an adjective.

Intellectual

Threats with out follow up are ineffectual to the long term upbringing of a child. Throwing marshmallows at an elephant is really ineffectual. The elephant wouldn't notice. The No Child Left Behind Act was ineffectual in improving education for non-college bound students. The teacher's attempts to keep order in the classroom were quite ineffectual.

Ineffectual refers to a feeling or state of uselessness. A sentence with the word ineffectual might be, "While Bill was having surgery, Sandy felt so ineffectual; there was nothing she could do to help him."