stainer

/ˈsteɪnər/
noun
  1. A substance used to change the color of wood, fabric, or other materials.
    • He applied a dark wood stainer to the bookshelf to match the furniture.
    • She chose a water-based stainer for the fence because it was easier to clean up.
    • The stainer gave the deck a rich, warm brown color.
  2. A person or thing that causes a stain.
    • The mechanic was a stainer of clothes, always covered in grease.
    • Red wine is a notorious stainer of tablecloths.
    • That marker is a permanent stainer, so be careful where you use it.
Synonyms
What does "stainer" mean? | whatsthatwordmean | whatsthatwordmean