What is but instead?

"But instead" is a transition phrase that is used to introduce a contrasting idea or action. It is commonly used to indicate that a different course of action or idea is being taken instead of the one previously mentioned.

For example,

• I was going to go to the gym after work, but instead, I decided to go for a walk in the park.
• She studied law in college, but instead of becoming a lawyer, she decided to pursue a career in teaching.
• He planned to buy a new car, but instead, he decided to save the money for a down payment on a house.

In summary, "but instead" is a transitional phrase that helps to show contrast and provides an alternative option to what was initially planned or discussed.