refudiate

verb

Etymology: Blend of refute + repudiate. Often associated with Sarah Palin's infamous 2010 lapsus linguae. A few rare attestations predate the 1970s. Since then the word has been uncommon although not rare, but many written occurrences of the word focus on prescriptively repudiating its use; it remains nonstandard.

1. To repudiate, to oppose.

   “Blends are the simplest kind of slip of the tongue […] some examples […] "refudiating" (refuting + repudiating).”

   “[…] their articles were read to determine whether the citation was to substantiate or refudiate the initial claim or was it a "quote of acceptance".”