adjective
- not effectual; without satisfactory or decisive effect: an ineffectual remedy.
- unavailing; futile: His efforts to sell the house were ineffectual.
- powerless; impotent.
adjective
- having no effect or an inadequate effect
- lacking in power or forcefulness; impotentan ineffectual ruler
early 15c., from in- (1) “not, opposite of” + effectual. Related: Ineffectually; ineffectuality.