renature

[ree-ney-cher]
verb (used with object), re·na·tured, re·na·tur·ing.
  1. to restore (a denatured substance) to its former, natural state.

Origin of renature

1925–30; re- + nature; cf. denature
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018