verb
stains; stained; staining
to leave a mark on something [+ obj]
[no obj] :to be marked or damaged by a stain
[+ obj] :to use a special liquid to change the color of (something)
[+ obj] :to damage or spoil (something, such as someone's reputation)
noun
plural stains
[count] a mark made on a surface, a piece of clothing, etc., that is very hard or impossible to remove
a special liquid that is used to change the color of something (such as wood or cloth)
something that causes people to have less respect for someone :something that damages a person's reputation - usually singular