1. learn something again, as after having forgotten or neglected it; - Example: "After the accident, he could not walk for months and had to relearn how to walk down stairs"
WordNet (r) 3.0 (2006):
relearn
v 1: learn something again, as after having forgotten or
neglected it; "After the accident, he could not walk for
months and had to relearn how to walk down stairs"