confidant
US
UK confidant n: ([sb] who is told a secret)
SC 倾诉秘密的对象 qīng sù mì mì de duì xiàng
He denied that he'd been the convict's confidant in prison.
confidant n: (close friend)
SC 密友 mì yǒu
SC 知己 mì yǒu，zhī jǐ
You need to talk this over with a confidant.