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[French, from Old French present participle of nonchaloir, to be unconcerned, non-, non-, + chaloir, to cause concern to (from Latin calēre, to be warm, heat up; see kelə-1).]
 | The American Heritage® Dictionary of the English Language, Fourth EditionCopyright © 2005, 2000 by Houghton Mifflin Company. Updated 2005. Published by Houghton Mifflin. All rights reserved. |
