אּם a primitive particle; used very widely as demonstrative, lo!; interrog., whether?; or conditional, if, although; also Oh that!, when; hence, as a negative, not: (and, can-, doubtless, if, that) (not), + but, either, + except, + more(-over if, than), neither, nevertheless, nor, oh that, or, + save (only, -ing), seeing, since, sith, + surely (no more, none, not), though, + of a truth, + unless, + verily, when, whereas, whether, while, + yet.