to refuse to do sth or to change your mind about sth :
They dug in their heels and would not lower the price.
to refuse to do sth or to change your mind about sth :
They dug in their heels and would not lower the price.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005