mordant
adjective(mor-dant)
of a substance, especially a strong acid; capable of destroying or eating away by chemical action
mordant
adjective(mor-dant)
harshly ironic or sinister
Examples:
Fun ranging from slapstick clowning ... to savage mordant wit.
mordant
noun(mor-dant)
a substance used to treat leather or other materials before dyeing; aids in dyeing process