An ineffectual person is someone who fails to achieve their goals or make an impact in their chosen area, often due to a lack of skill, knowledge, or motivation. There are various synonyms for this term, including inefficient, ineffective, feckless, incompetent, useless, and inept. These words all describe someone who is unable to produce positive results or make a meaningful contribution. Other related terms include bungling, unproductive, impotent, ham-fisted, and do-nothing. These words all highlight the same shortcomings, conveying the sense that the person in question is unable to accomplish their objectives or fulfill their responsibilities effectively.