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