ineffectual
US /ˌɪn.ɪˈfek.tʃu.əl/
UK /ˌɪn.ɪˈfek.tʃu.əl/

1.
inefficace, ineffettivo
not producing any or the desired effect
:
•
The efforts to clean up the oil spill were largely ineffectual.
Gli sforzi per ripulire la fuoriuscita di petrolio sono stati in gran parte inefficaci.
•
His leadership was ineffectual, leading to many problems.
La sua leadership fu inefficace, portando a molti problemi.