"ineffectual" in the adjective sense
1. ineffective, uneffective, ineffectual
not producing an intended effect
"an ineffective teacher"
"ineffective legislation"
2. futile, ineffectual, otiose, unavailing, meaningless
producing no result or effect
"a futile effort"
"the therapy was ineffectual"
"an otiose undertaking"
"an unavailing attempt"
3. ineffective, ineffectual, unable
lacking in power or forcefulness
"an ineffectual ruler"
"like an unable phoenix in hot ashes"
Source: WordNet® (An amazing lexical database of English)
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