re·nounce 
(rĭ-nouns)
(rĭ-nouns)v. re·nounced, re·nounc·ing, re·nounc·es
v.tr.
1.
a. To give up (a title or possession, for example), especially by formal announcement.
b. To decide or declare that one will no longer adhere to (a belief or position); reject.
c. To decide or declare that one will no longer engage in (a practice) or use (something): renounce violence. See Synonyms at relinquish.
2. To disclaim one's association with (a person or country, for example).
v.intr.
To give up, relinquish, or reject something.
[Middle English renouncen, from Old French renoncer, from Latin renūntiāre, to report : re-, re- + nūntiāre, to announce (from nūntius, messenger; see neu- in the Appendix of Indo-European roots).]
re·nouncement n.
re·nouncer n.