tarnish - Dictionary definition and meaning for word tarnish
its opposite of garnish..simple
opposite to varnish(A coating that provides a hard, lustrous, transparent finish to a surface)
Tarnish and Polish are rhyming words and one helps to remove the other. If you apply polish to a rusted metal, it will help remove the tarnish.
tarnish,tardy,mundane, sluggish,slack,shoddy:all these means DULL.......!:)