to stick to your guns = to continue to have your beliefs or continue with a plan of action, even if other people disagree with you
Despite the advice from his surrounding, he stuck to his guns on this issue.
to stand one’s ground = to maintain one’s position
The captains of these ships stood their ground and fought, disobeying their admirals.
to dig one’s heels in = to refuse to change your plans or ideas, especially when someone is trying to persuade you to do so
She had tried to convince her sister to rent a hall, but DeDe dug in her heels and announced that she’d always dreamed of getting married in Mama’s backyard.
to put one’s foot down = to use your authority to stop something happening
Enough is enough. It’s time to put your foot down.
to not give an inch = to not change your opinion or decision
However I tried to convince her, she didn’t give an inch.
