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Synonyms for Unstained (same or very similar meaning)

WordNet sense 1 (not having a coating of stain or varnish):

WordNet sense 2 (not having a coat of paint or badly in need of a fresh coat):

WordNet sense 3 (without soil or spot or stain):
unsoiled, unspotted

WordNet sense 4 (free from dirt or impurities; or having clean habits):

WordNet sense 5 (of reputation):
stainless, unsullied, untainted, untarnished

WordNet sense 6 (free from physical or moral spots or stains):

From the ODE community, based on WordNetadd/edit