Engrained vs. Ingrained: What's the Difference?

Engrained and Ingrained Definitions
Engrained
To ingrain.
Ingrained
Firmly established, as by long conditioning; deep-seated
Ingrained prejudice.
The ingrained habits of a lifetime.
Engrained
Simple past tense and past participle of engrain
Ingrained
Worked deeply into the texture or fiber
A carpet disfigured by ingrained dirt.
Ingrained
Being an element; present in the essence of a thing
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Ingrained
Fixed, established
Ingrained
Simple past tense and past participle of ingrain
Ingrained
(used especially of ideas or principles) deeply rooted; firmly fixed or held;
Deep-rooted prejudice
Deep-seated differences of opinion
Implanted convictions
Ingrained habits of a lifetime
A deeply planted need