WordWeb Online

1. Harshly ironic or sinister
   "fun ranging from slapstick clowning ... to savage mordant wit";
   - black, grim
    
2. Of a substance, especially a strong acid; capable of destroying or eating away by chemical action
   - caustic, corrosive, erosive, vitriolic

1. A substance used to treat leather or other materials before dyeing; aids in dyeing process

Sounds like: moose, moudant, mor

Derived forms: mordants

See also: destructive, sarcastic, sarky [Brit, informal]

Type of: color [US], coloring material [US], colour [Brit, Cdn], colouring material [Brit, Cdn]

Encyclopedia: Mordant