Simple past tense and past participle of prefer.(verb)
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Use "preferred" in a sentence
"It really gave one quite a shock to realise _how_ grown-up the old companions had become even the brothers Harry and Russell were transformed into tall striplings who bought newspapers on their own account, and preferred, actually _preferred_, to be clean rather than dirty!"
"Eviscerate is the term preferred by feminists and other right-minded people to emasculate, as it is gender neutral and has the added advantage of not insulting those of us who are non-masculine by nature."
"She also referred to the South China Sea as the West Philippine Sea, a term preferred in the Philippines but reviled in China."