/ dɪˈsembl; NAmE / verb
( formal ) to hide your real feelings or intentions, often by pretending to have different ones :
[ v ]
She was a very honest person who was incapable of dissembling.
[also vn ]
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WORD ORIGIN
late Middle English : alteration (suggested by semblance ) of obsolete dissimule , via Old French from Latin dissimulare disguise, conceal.