(of a rule or discipline) Rigidly enforced, typically demanding total obedience or observance

Unwilling to change or compromise

Given to exacting standards of discipline and self-restraint

Not cooperative

Difficult

Having or showing dogged determination not to change one's attitude or position on something, especially in spite of good arguments or reasons to do so

That cannot be altered

Inflexible, unyielding

Not adaptable in outlook, belief, or response

Over-concerned with procedure at the expense of efficiency or common sense

Not able to be changed or adapted to particular circumstances