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open sesame

noun
1.
any marvelously effective means for bringing about a desired result:
Wealth is the open sesame to happiness.
Origin
1785-1795
1785-95; from the use of these words by Ali Baba to open the door of the robbers' den
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for open-sesame

open sesame

noun
1.
a very successful means of achieving a result
Word Origin
from the magical words used by Ali Baba in The Arabian Nights' Entertainments to open the door of the robbers' den
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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