1. not producing any or the desired effect; failing to accomplish a purpose

Examples

• The medicine proved ineffectual against the infection.
• His ineffectual attempts to fix the computer only made things worse.
• The committee’s ineffectual leadership led to no real progress.
• She felt ineffectual in her new role as manager.
• The protest was largely ineffectual in changing government policy.
• His ineffectual speech failed to inspire the audience.