According to vingt's Alliance Francaise class, the word quarantine comes from the French word, une quarantaine, meaning 'about forty' - because a quarantine lasted 40 days. :)
Firstly, the French word is quarantaine. Secondly, the OED suggests that quarantine comes from (presumably old) Italian quarentina or French quaranta (ie, forty, not 'about forty').
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Date: 2006-05-16 10:03 pm (UTC)