The word uneffectual, often used to describe something or someone that is unable to produce any meaningful results or effects, has several synonyms that can be employed in its place. These synonyms include ineffective, useless, futile, feeble, powerless, ineffective, unproductive, fruitless, impotent, and inadequate. Each of these words refers to something or someone that is ineffective in achieving a desired result, either because of a lack of strength, ability, or relevance. Therefore, if you want to replace the word uneffectual in your writing, consider using one of these synonyms to make your writing more precise and engaging.