Simple past tense and past participle of conceal.(verb)
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Use "concealed" in a sentence
"She noticed the label concealed a seam, a hidden compartment revealed some dark residue."
"Junior was hunched forward on the seat, his wrists cuffed, the chain between his ankles vibrating with the motion of the truck, his expression concealed from Jackson Posey."
"Everything in Ireland that was once concealed is now, for them, fair game: Is the Church still against fornication?"