The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix II
Semitic Roots
ENTRY:
mn.
DEFINITION:
West Semitic, to be firm, confirmed, reliable, faithful, have faith, believe. a.amen, from Hebrew mn, truly, certainly; b.Mammon, from Aramaic mmon, probably from Mishnaic Hebrew mmôn, probably from earlier *mamn (? security, deposit). Both a and b from Hebrew man, to be firm.