adj. 1. Not producing the desired effect: an ineffectual treatment for indigestion. See Synonyms at futile. 2. Lacking forcefulness or effectiveness; inadequate or incompetent: an ineffectual ruler; ineffectual in dealing with a problem. in′ef·fec′tu·ali·ty (-ălĭ-tē), in′ef·fectu·al·ness n. in′ef·fectu·al·ly adv. |
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