Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of '-ier'< various sources: 1. ME < OFr < L -arius; 2. Fr < OFr as in 1, with the primary stress in Eng on the suffix; 3. ME var. of -er; 4. ME < -i- ending of Ieper stem + -er