Simple past tense and past participle of whiten.(verb)
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Use "whitened" in a sentence
"Is the reason why you don't get them whitened is because you can't afford to drop $600 on the cleaning?"
"The teachings of Mr. Muhammad stressed how history had been "whitened" - when white men had written history books, the black man simply had been left out."
"Jesus was essentially "whitened" to match the skin pigmentation of the elite cliques of Europe ..."