dig one's heels in
English
Verb
dig one's heels in (third-person singular simple present digs one's heels in, present participle digging one's heels in, simple past and past participle dug one's heels in)
- (idiomatic) to refuse to change one's plans or ideas, especially when counseled otherwise
- Used other than with a figurative or idiomatic meaning: see dig, heel, in.
See also
- harden someone's heart