Hey student! How about an expression in English? Do you know what stuck in a rut means? This is a very common English expression native speakers use all the time.
STUCK IN A RUT
First, let’s understand what “rut” is

As you can see on the image, this is a rut. it’s the track of the wheels of cars on the road, and they are usually very deep.
Depending on how deep the rut is, some cars can get stuck and will NOT move because of this very deep rut, especially in muddy roads.
This is the literal meaning of stuck in a rut. A vehicle can literally get stuck in a rut.
How about the expression?
We can use stuck in a rut to describe how a person is feeling.
When you feel like you have been doing something for a very long time and you feel need to change. Let’s put this into a context. Let me talk to you about Nina
Nina is 30 years old. She has been working for a car company for 10 years. She got promoted 3 times. She is very good at her job. However, lately, she has been feeling “stuck in a rut”. She is tired of doing the same thing. She is a little frustrated and she feels she needs to change. She is considering going back to school or finding a new job. She doesn’t want to work at the car company anymore.