בִּלְתִּי
From LSJ
English (Strong)
constructive feminine of בָּלָה (equivalent to בְּלִי); properly, a failure of, i.e. (used only as a negative particle, usually with a prepositional prefix) not, except, without, unless, besides, because not, until, etc.: because un(satiable), beside, but, + continual, except, from, lest, neither, no more, none, not, nothing, save, that no, without.