1. in a way that serves no purpose or has no beneficial effect

Examples

• She spent hours uselessly searching for her lost keys in the wrong room.
• The old computer sat uselessly in the corner, too slow to run modern software.
• He argued uselessly with the automated phone system.
• The broken umbrella hung uselessly by the door.
• They waited uselessly for a bus that never came.
• The medicine worked uselessly against the new strain of virus.