You might say prohibit, veto or bar. Other fairly similar words are preclude and block.
The word 'veto'.
Veto is not actually Greek it is Latin verb; Veto, Vetare, Vetui, Vetitus meaning To Forbid or Tell not to. The first principle part of the verb Veto is where the English word Veto comes from meaning "I" Forbid. Hope that helps ^_^
The meaning of the word forbid is to not allow something or prevent something from happening. It can also be applied to stopping someone from doing something - as in forbidding a princess from leave a tower.
the latin word for i forbid is"vedo"
The future tense of the verb to forbid is will forbid.
To forbid = asar (אסר)
forbid (verb) = asar (אסר)
The four letter word that means, "I forbid," is veto.veto
i forbid you from going outside
The Latin word veto, vetare, vetui, vetitum (originally meaning "to forbid or oppose") probably comes closest to the English "cancel, prohibit." You could also use prohibeo, prohibere, prohibui, prohibitum (forbid, prohibit, restrain) or interdico, interdicere, interdixi, interdictum (prohibit, forbid).
His parents forbid him from having a party while they were away.
Forbid, ban, bar, exclude, proscribe, outlaw, disallow, rule out, veto, interdict