stairs

词形变化：

形容词: stainable | 名词: stainer | 动词过去式: stained | 动词过去分词: stained | 动词现在分词: staining | 动词第三人称单数: stains |

同义词：

soil | discolor | stigma | dye | blemish | tint | taint | spot | mark | blot | colour | sully | defile | smear | tarnish | imperfection | slur | dirt | disgrace | discolour | dirty | shame | color | smudge | cloud | pigment | tone | daub | addle | tinge | disfigurement | embarrassment | smirch | brand | discolouration | grease | grime | discoloration | filth | grunge | maculate | paint |

反义词：

cleanse |