dissembler
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/dɪˈsemblər/
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/dɪˈsemblə(r)/
Someone who hides their true feelings or thoughts by pretending to feel or think something different.
He was a master dissembler, always pretending to agree when he actually disagreed.
他是個擅長偽裝的人,總是假裝同意,實際上卻不同意。