remediate

verb

1. (transitive)To correct or improve (a deficiency or problem).

   “Network Rail's busy Easter included a ten-day closure of the main trans-Pennine route between Manchester and Leeds, for work to install a new bridge deck at Huddersfield, remediate mining works at Ravensthorpe and Huddersfield, and to lay new track at Deighton and Mirfield.”

adj

1. (archaic, rare)Intended to correct or improve deficient skills in some subject.
2. (obsolete)Remedial.

   “Be aidant and remediate / In the good man's distress!”