Adjective

(-)

defective and impossible to materially correct or set aright.

''The construction flaw is incorrigible ; any attempt to amend it would cause a complete collapse.

incurably depraved; not reformable.

''His dark soul was too incorrigible to repent, even at his execution.

impervious to correction by punishment or pain.

''The imp is incorrigible : his bottom is still red from his last spanking when he plans the next prank.

unmanageable.

* {{quote-news

, year=2006 , date=December 7 , author=Michael White , title=Breaking up is hard to do, even at the Treasury , work=the Guardian citation , page= , passage=Gordon Brown may have his grumpy, Granita moments, but as a strategist he is an incorrigible optimist.}}

determined, unalterable, hence impossible to improve upon.

''The laws of nature and mathematics are incorrigible .

(archaic) incurable.

Adjective

(en-adj)

Without use or possibility to be used.

This fork has prongs that are bent. It's useless now.

Unhelpful, not useful; pointless (of an action).

I think it's useless to keep this discussion going. It's like talking to a wall.

I tried my best to make him quit smoking, but my efforts were useless . He now smokes six packs a day.

(pejorative, of a person) good-for-nothing; not dependable.

Bill never mows the lawn, takes out the trash or anything. He's useless , but I love him anyways.

(colloquial, of a person) unable to do well at a particular task or thing. Useless is mildly insulting.

My brother is useless at most computer games, but he is an awesome PS2 player.

Why do you keep trying? You're obviously useless at it.