sticking to

Sticking to means remaining faithful or committed to something—a plan, a promise, a principle, a story.

If you stick to your guns, you maintain your position despite opposition.

If you stick to a diet, you don't cheat.

The phrase implies discipline or stubbornness, depending on context: She's sticking to her version of events despite the evidence.

It can also mean physically adhering: The label isn't sticking to the jar.