Interesting to see what words most people don't know; but the thrust of the article is that the words tend to have such negative connotations.
Is this because the world is a miserable place? Or the NY Times' outlook is sour? Or, more positively, that we know more difficult happy words than we do sad ones?
NYTimes.com's most looked-up words for 2011: Even more morose than last year's list
http://www.niemanlab.org/2011/07/nytimes-coms-most-looked-up-words-for-2011-even-more-morose-than-last-years-list/