-algia(word root) painExamples of words with the root -algia: neuralgiaAbused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree-algiasuff. Pain: neuralgia.[Greek, from algos, pain.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.-algia n combining form (Medicine) denoting pain or a painful condition of the part specified: neuralgia; odontalgia. [from Greek algos pain] -algic adj combining formCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-algia or -algy, a combining form meaning ?pain? of the kind or in the body part or organ specified by the initial element: causalgia; neuralgia.[