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.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.