different between ironwilled vs immovable

English

From Middle English, equivalent to im- +? movable.

immovable (comparative more immovable, superlative most immovable)

incapable of being physically moved; fixed
steadfast in purpose or intention; unalterable, unyielding
- 1994, Nelson Mandela, Long Walk to Freedom, Abacus 2010, p. 101:
  I pleaded with him not to resign, but he was immovable.
not capable of being affected or moved in feeling; impassive
- 1690, John Dryden, Epistle Dedicatory to Don Sebastian
  How much happier is he […] who ent'ring on himself remains immovable, and smiles at the madness of the Dance
(law) not liable to be removed; permanent in place or tenure; fixed

immovable (plural immovables)

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