Useless (Not Unuseful)

Many English learners make the mistake of saying “unuseful” when they really mean “useless.”

But “unuseful” is not a common or natural word in English. 

✅ Correct: This tool is useless.

❌ Wrong: This tool is unuseful.

“Useless” means something does not help you. It has no use.

Use + less = useless (no use)

Here are more examples with “-less” words (not “un-”):

❌ Don’t Say ✅ Say       Meaning

unpowerful --> powerless =  no power or strength

unhopeful -->   hopeless =          no hope

uncareful -->       careless =         not careful

unthankful -->  thankless  =        no thanks or reward

Tip: If you are not sure, try using a “-less” word instead of adding “un-.” Many times, it will sound more natural.

Now you know—don’t say unuseful. Say useless!