"mordant" in the noun sense
a substance used to treat leather or other materials before dyeing aids in dyeing process
"mordant" in the adjective sense
1. black, grim, mordant
harshly ironic or sinister
"a grim joke"
"fun ranging from slapstick clowning ... to savage mordant wit"
2. caustic, corrosive, erosive, vitriolic, mordant
of a substance, especially a strong acid capable of destroying or eating away by chemical action
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License