unstained

adjectives

not stained
"An apron keeps his clothing unstained"
unstained
antonym
stained
is similar to
(of a specimen for study under a microscope) not treated with a reagent or dye
untreated
not having a coating of stain or varnish
unstained, unvarnished
without soil or spot or stain
unsoiled, unspotted, unstained
(of reputation) free from blemishes
"his unsullied name"; "an untarnished reputation"
stainless, unstained, unsullied, untainted, untarnished