proc•ess

– noun
1. a systematic series of actions directed to some end.
2. a continuous action, operation, or series of changes taking place in a definite manner.

es•sence

– noun
1. the basic, real, and invariable nature of a thing or its significant individual feature or features.
2. a substance obtained from a plant, drug, or the like, by distillation, infusion, etc., and containing its characteristic properties in concentrated form.
3. the inward nature, true substance, or constitution of anything, as opposed to what is accidental, phenomenal, illusory, etc.
4. something that exists, esp. a spiritual or immaterial entity.

skull

– noun
1. the bony framework of the head, enclosing the brain and supporting the face; the skeleton of the head.
2. the head as the center of knowledge and understanding.

re•cal•ci•trant

- adj.
1. resisting authority or control; not obedient or compliant; refractory.
2. hard to deal with, manage, or operate.

in•tran•si•gent

- adj.
1. refusing to agree or compromise; uncompromising; inflexible.
- noun
2. a person who refuses to agree or compromise, as in politics.