Difference between Useless and Cast Off

USELESS vs CAST OFF: ADJECTIVE

Make the last row of stitches when knitting
Get rid of
To discard or reject something.
To let go (a cable or rope securing a vessel to a buoy, wharf etc) so that the vessel may make way.
To finish the last row of knitted stitches and remove them securely from the needle.

Having no use; being of no use; unserviceable; usable to no good end; answering no valuable purpose; not advancing the end proposed; unprofitable; ineffectual.
Synonyms Useless, Fruitless, Ineffectual, Unavailing, bootless, profitless, unprofitable, valueless, worthless, futile, abortive. Useless often implies that the cause of failure lies in the situation; as, it is useless to try to mend that clock. Useless is the only one of these words that may thus be applied by anticipation to what might be attempted. That which is fruitless, ineffectual, or unavailing actually fails, and from hindrances external to itself. Unavailing is more likely to be used the fruitless or ineffectual where the failure is through some one's unwillingness; as, unavailing prayers or petitions, ineffectual efforts, fruitless labors. Fruitless is stronger and more final than ineffectual or unavailing.

Cast off, Scrap, Waste, Unprofitable, Junked, Unavailing, Unserviceable, Discarded, Otiose, Inutile, Unhelpful, Unuseable, Ineffectual, Unusable, Futile

Dustheap, Keep apart, Rake in, Forworn, Wear away, Foreworn, Discard, Chuck out, Throw off, Throw away, Shake off, Shed, Drop, Throw, Cast

Cast off, Scrap, Waste, Unprofitable, Junked, Unavailing, Unserviceable, Discarded, Otiose, Inutile, Unhelpful, Unuseable, Ineffectual, Unusable, Futile

Passement, Forwaste, Rake up, Dustheap, Keep apart, Rake in, Forworn, Wear away, Foreworn, Discard, Chuck out, Throw away, Shed, Throw, Cast

The principal, teachers and IT staff are useless.
It does not make you a useless idiot.
Otherwise, they risk being misunderstood and therefore useless.
TRIED CALLING MTNL CUSTOMER CARE BUT ASUSUAL USELESS.
How The Meta is Shifting; Most Useless Commander?
Program sandbags are useless without having the bodyweight!
Stop wasting your time with those useless methods.
Cut all the useless clubs, the unnecessary tables, the investments that are fun to be in but useless to the bottom line.
While the temptations to go in useless or worse than useless direction, certainly exists, there are amazing things on the internet.
If Christ was not raised, then all our preaching is useless, and your trust in God is useless.

Informed coxswain when lines where onboard or cast off.
Enjoy watching the sun rise as you cast off.
Be severe in deciding what obstructions to cast off.
What an intolerable burden had he cast off.
For the Lord will not cast off forever.
: : Cast off all and come to your places.
What happens if you take your cast off?
You have injury on the hand, have a cast off, have other motion, that going to cast to greater distance.
Using the cast off tail thread this through the centre of the ear and tie to cast on tail.
The word is variously used, as to cast anchor, to cast off a rope.