Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

c.1300, from Old French defamer (13c., Modern French diffamer), from Medieval Latin defamare, from Latin diffamare "to spread abroad by ill report, make a scandal of," from dis- suggestive of ruination + fama "a report, rumor" (see fame (n.)). Related: Defamed; defaming.