reddener

From redden + -er.

reddener (plural reddeners)

1. Someone or something which reddens.
   • 1968, Janey Ironside, A Fashion Alphabet, page 191:

     Henna, a vegetable extract, was one of the earliest known dyes and is still used as a reddener for hair; nitrate of silver and gum water, walnut juice, iron rust, vinegar - all sorts of recipes have been tried over the years...

   • 1895, William Morris, The Saga Library, page 492:

     Reddener of eagles' footsoles: "arnar il-rjóðr" = "rjóðr arnar ilja," who provides bleeding corpses for eagles to stand on and tear, warrior, Magnus the Good.

• derender, rendered