pro·hib·it 
(prō-hĭbĭt)
(prō-hĭbĭt)tr.v. pro·hib·it·ed, pro·hib·it·ing, pro·hib·its
1. To forbid by authority: Smoking is prohibited in most theaters. See Synonyms at forbid.
2. To prevent; preclude: Modesty prohibits me from saying what happened.
[Middle English prohibiten, from Latin prohibēre, prohibit- : pro-, in front; see PRO-1 + habēre, to hold; see ghabh- in the Appendix of Indo-European roots.]