Wiktionary:Foreign Word of the Day/2012/September 22

Foreign word of the day  in French
ne particle
  1. (literary) not (used alone to negate a verb; now chiefly with the verbs pouvoir, savoir, cesser and oser)
  2. not, no (used before a verb, with a subsequent element following)
  3. Used in a subordinate clause before a subjunctive verb (especially when the main verb expresses doubt or fear), to provide extra overtones of doubt or uncertainty (but not negating its verb); the so-called "pleonastic" or "expletive" ne.
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