noneffective
adjective
non·ef·fec·tive ˌnän-i-ˈfek-tiv 
-e-,
-ē-,
-ə-
: not effective
especially : not producing an intended or desired effect
noneffective government programs
noneffective leaders
noneffective classroom instruction
noneffectively adverb
noneffectiveness noun
Word History
First Known Use
1781, in the meaning defined above