dissimulate
dis.sim.u.late \(')dis-'im-y*-.la-t\ \(.)dis-.im-y*-'la--sh*n\
\(')dis-'im-y*-.la-t-*r\ vb [L dissimulatus, pp. of dissimulare, fr. dis- +
simulareX to simulate : to hide under a false appearance : DISSEMBLE : to
engage in dissembling - dis.sim.u.la.tion n
Webster's English Dictionary