Ineffectual(adjective)
without the ability to achieve much; weak; not achieving what you want to.
Hindi meaning:निष्प्रभावी
Synonyms: Ineffective, Useless, Weak, Impotent
Antonyms: Effectual, Effective, Adequate, Potent
Example: He plays the role of a blustering and ineffectual teacher.
Trick to remember: Jiska effect nahi wo ineffectual hai. 
