Collins COBUILD Advanced Learner's English Dictionary - obduracy

If you accuse someone of obduracy, you think their refusal to change their decision or opinion is unreasonable. (FORMAL) MPs have accused the government of obduracy and called on ministers to reverse their decision. = obstinacy N-UNCOUNT c darkgreen]disapproval OBDURATE If you describe someone as obdurate, you think that they are being unreasonable in their refusal to change their decision or opinion. (FORMAL) Parts of the administration may be changing but others have been obdurate defenders of the status quo. = obstinate ADJ c darkgreen]disapproval