Origin of mordacious; from Classical Latin mordax (gen. mordacis), biting ; from base of mordere, to bite: see mordant and amp; -ous
- Given to biting; biting.
- Caustic; sarcastic.
Origin of mordaciousLatin mordāx, mordāc- (from mordēre, to bite; see mer- in Indo-European roots) + –ious.
(comparative more mordacious, superlative most mordacious)
From Latin mordax (“given to biting, corrosive") (from mordere (“to bite, sting")) + -ious.