Definitions

1. noun

a person who or thing that stains something

“The stainer of the old rug was a mystery to the family.”

2. verb

to leave a stain or discoloration on something

“The red wine stainer the carpet, and it was impossible to clean.”

3. verb

to mark or discolor something, typically in a way that is difficult to remove

“The acid stainer the metal, causing it to corrode.”

4. noun

a tool or device used to stain something, especially wood

“The woodworker used a stainer to add color to the furniture.”