Avoiding and Preclude

verb

• Keep from happening or arising; make impossible.
  • usage: "My sense of tact forbids an honest answer"; "Your role in the projects precludes your involvement in the competitive project"
  • synonyms: prevent, forestall, foreclose, forbid
• Make impossible, especially beforehand.
  • synonyms: rule out, close out

• (v.) To shut out by anticipative action; to prevent or hinder by necessary consequence or implication; to deter action of, access to, employment of, etc.; to render ineffectual; to obviate by anticipation.
• (v.) To put a barrier before; hence, to shut out; to hinder; to stop; to impede.