Learn English – One word for spending money less than the amount that someone/something requires

There are quite a few words that can be insulting about someone who doesn't like to spend money.

A miser is

a mean grasping person; especially : one who is extremely stingy with money

"stingy" is also kind of insulting, as it describes someone who is "not generous",

not liking or wanting to give or spend money

A scrooge is someone who is a miser and stingy:

her father is a real scrooge and refuses to pay her way through college, even though he can easily afford it

This word comes from the Charles Dickens story A Christmas Carol - Ebenezer Scrooge is a rich but very mean man who makes his employees work long hours for little pay.

Here's a picture of someone in the role of Mr Scrooge:

A "tightwad" and a "cheapskate" are also people who don't like to spend money. These words are a bit less negative, though: the person may not like to share or help others, but they are not as mean as a miser or a scrooge.

"cheap" is another good word. It is also used for things of poor quality, so it suggests a person of low morals or class who is also stingy.

You can use wish ill upon as in I would never wish ill upon anyone, but I hope never to see her again.

The following are informal

If the two parties are in the same place, then one of them can give the other the evil eye. A slightly cruder, less formal expression is giving someone a stink eye. The recipient of the stink eye doesn't necessarily need to know it - it can be given behind their back. If you can't actually see the other person, you'll have to settle for sending them bad vibes.

If you hope someone has bad luck, you could wish bad juju on someone.

If you have a superstition that some small action on your part could bring them bad luck, you can jinx them by performing that act. (West Coast AmE)