If you disinherit your child and say that he is no longer your son, this is an example of when you disavow him.
Origin of disavowMiddle English disavouen ; from Old French desavoer: see dis- and amp; avow
transitive verbdis·a·vowed, dis·a·vow·ing, dis·a·vows
- To disclaim knowledge of, responsibility for, or association with: “The American communists &ellipsis; promoted Roosevelt's reelection in 1944—although Roosevelt formally disavowed their support” (Donald A. Ritchie).
- To assert to be wrong or of little value: “After 1920 his style changed almost completely, and he disavowed his early works” (Mary V. Dearborn).
Origin of disavowMiddle English disavowen, from Old French desavouer : des-, dis- + avouer, to avow; see avow.
(third-person singular simple present disavows, present participle disavowing, simple past and past participle disavowed)
- To refuse strongly and solemnly to own or acknowledge; to deny responsibility for, approbation of, and the like; to disclaim; to disown.
- He was charged with embezzlement, but he disavows the crime.
- To deny; to show the contrary of; to disprove.
- Because of her dissatisfaction, she now disavows the merits of fascism.
From dis- + avow or from Old French desavouer.