Focus on the pronunciation of stain
English definition of “stain”
/steɪn/ n [C]
› a dirty mark on something that is difficult to remove: The tomato sauce left a stain on the tablecloth. › A stain is also a thin, oily liquid used to change the color of wood. › biology A stain is also a chemical used to color cells to make them easier to see when studying them under a microscope.