ineffectually
Definitions
In a manner that fails to produce the desired effect or result.
Without achieving a significant or intended impact.
Examples
He waved his arms ineffectually at the swarm of bees, but they continued to circle him.
The new policy was implemented ineffectually, failing to address the core issues within the department.
Synonyms
unsuccessfully fruitlessly vainly unproductively futilely pointlessly incompetently
Antonyms
effectively successfully productively efficiently competently fruitfully powerfully