Intractable and adamantine.

Change is indifferent, intractable.

The situation is intractable.

The Somali conflict seemed intractable.

You... you intractable son of bitch.

- Well... - Ammoniac stains are utterly intractable.

I'm sorry you're being so intractable.

The dropout problem is an intractable one.

Intractable, unbearable pain is up next.

You intractable son of a bitch.