
Useless
Negative Connotation
Use 'useless' to express frustration or disappointment in something's performance.

Buying that cheap vacuum was useless; it doesn't clean at all.
Unhelpful Efforts
Use 'useless' when someone's attempt to help has no positive outcome or makes no difference.

I know you tried to fix the leak, but it was a useless effort.
Extent of Uselessness
Combine 'useless' with words like 'completely' or 'utterly' to stress the total lack of effectiveness.

His advice was utterly useless in that situation.
Compare with
FutileIdleImportantIneffectivePointlessProductiveValueWorth
WordUp Chrome Extension
As you browse the web instantly look up words you don’t know.
Get Chrome Extension