stain·less /ˈstenləs/
  (a.)無瑕的,不鏽鋼的
  Stain·less, a. Free from stain; immaculate.
  The very care he took to keep his name
  Stainless, with some was evidence of shame.   --Crabbe.
  Syn: -- Blameless; spotless; faultless. See Blameless.
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  stainless
       adj : of reputation; "his unsullied name"; "an untarnished
             reputation" [syn: unstained, unsullied, untainted,
              untarnished]