ineffective

US /ˌɪn.ɪˈfek.tɪv/
UK /ˌɪn.ɪˈfek.tɪv/
"ineffective" picture
1.

inefficace, sans effet

not producing any significant or desired effect

:
The new policy proved to be ineffective in reducing crime.
La nouvelle politique s'est avérée inefficace pour réduire la criminalité.
His efforts to persuade her were completely ineffective.
Ses efforts pour la persuader furent complètement inefficaces.