Definition of "inefficacious" [in•ef•fi•ca•cious]

• Not capable of producing a desired effect or result; ineffective. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The sword is the braver way, although all ways are equally inefficacious."
• "And if experience showed the inefficacy of bills of rights, it also showed they were “rarely inefficacious” and better than nothing."
• "Even an executive customer service rep pledge to resolve the situation was inefficacious."