01 a. Not producing the proper effect; without effect; inefficient; weak; useless; futile; unavailing; as, an ineffectual attempt; an ineffectual…
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1.
Not producing the proper effect; without effect; inefficient; weak; useless; futile; unavailing; as, an ineffectual attempt; an ineffectual expedient.“The peony root has been much commended, . . . and yet has been by many found ineffectual.” — Boyle.
Syn.
Inefficient; useless; inefficacious; vain; fruitless; unavailing; futile. See Useless, Inefficacious.