stub·born
[stuhb-ern]
adjective
1.unreasonably obstinate; obstinately unmoving: a stubborn child.
2.fixed or set in purpose or opinion; resolute: a stubborn opponent of foreign aid.
3.obstinately maintained, as a course of action: a stubborn resistance.
4.difficult to manage or suppress: a stubborn horse; a stubborn pain.
5.hard, tough, or stiff, as stone or wood; difficult to shape or work.