in·ef·fec·tive 
/ˌɪnəˈfɛktɪv/ adjective
/ˌɪnəˈfɛktɪv/ adjective [more ineffective; most ineffective] : not producing or having the effect you want : not effective
▪ The treatment was ineffective against the disease. ▪ an ineffective law/leader
▪ The treatment was ineffective against the disease. ▪ an ineffective law/leader
— in·ef·fec·tive·ly adverb
▪ She argued her point ineffectively.
▪ She argued her point ineffectively.
— in·ef·fec·tive·ness noun [noncount]
▪ He has been criticized for his ineffectiveness as a leader.
▪ He has been criticized for his ineffectiveness as a leader.
