stainless
stain-less
adjective
Resistant to stains, rust, or corrosion, especially referring to metal.
"We chose a stainless steel kettle."
adjective
Free from moral blemish or impurity; untarnished and pure.
"Her stainless reputation was widely admired."
Thesaurus
Synonyms: unsullied, unmutilated, untarnished, unblemished, unstained, untainted, unmarred, stainless steel, chromium steel