overlearnt

o·ver·learn

 (ō′vər-lûrn′)
tr.v. o·ver·learned also o·ver·learnt (-lûrnt′), o·ver·learn·ing, o·ver·learns
To continue studying or practicing (something) after initial proficiency has been achieved so as to reinforce or ingrain the learned material or skill.

overlearnt

(ˌəʊvəˈlɜːnt)
adj
(Psychology) relating to repetitive practice or learning
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