overlearn

verb3

1. •
   To learn (something) more than is necessary; to study excessively, to take (something) too much to heart.
2. •
   To learn (something) to the point where responses become instinctive.
3. •
   Mostly when talking about neural networks, to learn a task to the point where responses actually start to degrade. Compare with overfit, in model tuning contexts.