obdurate /ˈɒbdjʊrɪt/

• 1. 

  ADJ If you describe someone as obdurate, you think that they are being unreasonable in their refusal to change their decision or opinion. 执拗的; 顽固不化的 [正式]

  例：

  Parts of the administration may be changing but others have been obdurate defenders of the status quo.

  政府的一些部门可能正在作出改变，但其他部门却要执意维持现状。