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‘social conventions honed over thousands of years were suddenly inefficacious’
‘Several writers argue that terrorism is generally inefficacious, strategically counterproductive and unsuccessful in attaining socio-political objectives.’
‘The ambitious but inefficacious poor soul has tried his best.’
‘But though it is not absolutely efficacious under all circumstances, it is of great potency always, and rarely inefficacious.’
‘Functionalism certainly does not imply that the mind is inefficacious.’
‘Then I just started wittering in a pretty inefficacious way at the Carribean customer service woman.’
ineffective, unsuccessful, non-successful, unproductive, fruitless, profitless, unprofitable, abortive, failed, futile, purposeless, worthless, useless, ineffectual, inefficient, inadequate, vain, unavailing, to no effect