Undermining

Verb
undermining

Noun

 * 1) The act or process by which something is undermined.

Thesaurus
answer, complete answer, confounding, confutation, contradiction, controversion, demolition, denial, discrediting, effective rejoinder, overthrow, overthrowal, rebuttal, refutal, refutation, squelch, subversion, upset, upsetting, wreckage, wrecking