deprecate

Short definition from Wiktionary

Verb

1. 1
   To express disapproval of, protest or plead against.
2. 2
   To belittle, depreciate.
3. 3
   To declare something obsolescent; to recommend against a function, technique, command, etc. that still works but has been replaced.
4. 4
   To pray against.
5. 5
   To regret deeply.