biting or given to biting.
sharp or caustic in style, tone, etc.
Origin of mordacious
1640–50; < Latin mordāci- (stem of mordāx given to biting) + -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Related Words for mordaciousacerbic, acid, acidic, acrid, acrimonious, astringent, bitter, caustic, corrosive, cutting, incisive, mordant, pungent, scathing, severe, sharp, slashing, trenchant, truculent, vitriolic
Examples from the Web for mordacious
Historical Examples of mordacious
sarcastic, caustic, or biting
Word Origin for mordacious
C17: from Latin mordax, from mordēre to bite
"given to biting," 1640s (originally figurative), from Latin mordac-, stem of mordax, from mordere "to bite," perhaps from PIE root mer- (2) "to rub, harm" (see smart (v.)). Related: Mordacity.
Online Etymology Dictionary, © 2010 Douglas Harper