S: (n) antagonism ((biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure)
S: (n) stonewalling (stalling or delaying especially by refusing to answer questions or cooperate)
S: (n) obstruction of justice (impeding those who seek justice in a court (as by trying to influence or intimidate any juror or witness or officer of the court); can result in a finding of contempt of court)
S: (n) nuclear deterrence (the military doctrine that an enemy will be deterred from using nuclear weapons as long as he can be destroyed as a consequence) "when two nations both resort to nuclear deterrence the consequence could be mutual destruction"
S: (n) prevention, bar (the act of preventing) "there was no bar against leaving"; "money was allocated to study the cause and prevention of influenza"
S: (n) averting (the act of preventing something from occurring) "averting danger was his responsibility"
S: (n) debarment (the act of prevention by legal means) "they achieved his debarment from holding public office"
S: (n) disqualification (the act of preventing someone from participating by finding them unqualified)
S: (n) recusation, recusal ((law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves)
S: (n) interception (the act of intercepting; preventing something from proceeding or arriving) "he resorted to the interception of his daughter's letters"; "he claimed that the interception of one missile by another would be impossible"
S: (n) nonproliferation, non-proliferation (the prevention of something increasing or spreading (especially the prevention of an increase in the number of countries possessing nuclear weapons)) "they protested that the nonproliferation treaty was just a plot to maintain the hegemony of those who already had nuclear weapons"; "nuclear disarmament and nonproliferation are closely related goals"
S: (n) save ((sports) the act of preventing the opposition from scoring) "the goalie made a brilliant save"; "the relief pitcher got credit for a save"
S: (n) suppression, crushing, quelling, stifling (forceful prevention; putting down by power or authority) "the suppression of heresy"; "the quelling of the rebellion"; "the stifling of all dissent"