Unless
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 491
un-les', conj. Except; if not; supposing that not; at or for le . 1 Unlike, Unsafe, Untie, etc. See under Unable.
Bu kavram başka kaynaklarda da geçiyor
Chamber's Twientieth Century Dictionary (1908)
Smith's Financial Dictionary (1903)
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