How do you say finish in spanish?

Finish in Spanish is Terminar or acabar.
Terminar or Finalizar

Acabar is used in the sense of using up or running out, like running out of ink:

Se me acabó la tinta. (literally: The ink finished itself to me.)

Dejar is used to finish or quit something such as a bad habit.

Deje de fumar. = I'm finished with smoking.