inflexible and stubborn
intransigent - stubborn
If you are ‘intransigent’, you are unwilling to change your ideas or behaviour, no matter how extreme, in a way that makes others view you as being unreasonable. Such an attitude can be destructive and elicit a lot of frustration and negativity from others, often making such people disliked and excluded.
If management continues to maintain its intransigent position then we will have no choice but to take industrial action.
There were countless warnings that our investment strategy left the company too exposed, but they were all willfully ignored. Now we’re paying the price for that intransigence.
The negotiations have stalled due to the intransigent and unrealistic attitude of the other party. It’s incredibly frustrating to deal with people like that.