(conj.) Upon any less condition than (the fact or thing stated in the sentence or clause which follows); if not; supposing that not; if it be not; were it not that; except; as, we shall fail unless we are industrious.

aside from bar barring beside besides but ex except except for except that excepting excluding exclusive of if not leaving out let alone omitting outside of precluding save save and except saving than unless that were it not without