not give an inch
US /nɑt ɡɪv ən ɪntʃ/
UK /nɑt ɡɪv ən ɪntʃ/

1.
寸步不让, 不让步
to refuse to change your opinion or decision, even when people try to persuade you
:
•
Despite strong opposition, the mayor would not give an inch on the new policy.
尽管遭到强烈反对,市长在新的政策上寸步不让。
•
The negotiators would not give an inch, leading to a stalemate.
谈判代表寸步不让,导致僵局。