
Immovable
Literally Unmovable
Used to describe something that can't be physically moved, often due to size or permanence.

The heavy safe in the basement was immovable.
Symbolic Object
Sometimes used metaphorically to describe a strong person or object that doesn’t give way under pressure.

In debates, she was the immovable object against any argument.
Compare with
FirmFixInflexibleStaticStationarySteadyStiffYield
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