This adverb and preposition is nonstandard when used as a conjunction meaning "unless." It is correct to say "We can't live without money" (without is a preposition here), but it is incorrect to say "We can't live without we have money." Hackneyed expressions using without include "without let or hindrance," "without a doubt," "without rhyme or reason," "make do without," "without the law," and "without a prayer." See also unless.
Dictionary of problem words and expressions. Harry Shaw. 1975.