Unuseful vs. Useful — What's the Difference?

Not useful; useless.

Able to be used for a practical purpose or in several ways

Having a beneficial use; serviceable

Being of practical use

Having a practical or beneficial use.

Full of use, advantage, or profit; producing, or having power to produce, good; serviceable for any end or object; helpful toward advancing any purpose; beneficial; profitable; advantageous; as, vessels and instruments useful in a family; books useful for improvement; useful knowledge; useful arts.

Being of use or service;

Of great importance or use or service;

Capable of being turned to use or account;

Having a useful function;