preclude

v. eliminate, exclude, remove; prevent, make impossible

Verb
1. keep from happening or arising; have the effect of preventing; "My sense of tact forbids an honest answer"
(synonym) prevent, forestall, foreclose, forbid
(hyponym) save, make unnecessary
(derivation) obviation, forestalling, preclusion
2. make impossible, especially beforehand
(synonym) rule out, close out
(hypernym) obviate, rid of, eliminate

v. preclude, debar, prevent

(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.
  

Synonyms and related words:
anticipate, avert, avoid, ban, bar, bar out, block, blockade, cease, check, count out, cut off, debar, deflect, deny, deter, disallow, discontinue, discourage, dishearten, embargo, enjoin, estop, exclude, exclude from, fend, fend off, forbid, foreclose, forestall, freeze out, frustrate, help, hinder, ignore, impede, inhibit, interdict, interfere with, keep from, keep off, keep out, leave out, lock out, obstruct, obviate, omit, ostracize, outlaw, pass over, prevent, prohibit, proscribe, quit, refuse, reject, relegate, repel, repress, repudiate, rule out, save, say no to, send to Coventry, shut out, stave off, stop, suppress, taboo, thwart, turn aside, ward, ward off