belie - verb
To misrepresent, to show to be false; to refute, disprove, gainsay. Often used to show an action directly contrary to the true situation, as in His shaking hands belied his calm smile and voice.
Hitler's outward hatred for Jews and Russians may have belied a secret passion for some of their greatest musical works, if a recently discovered cache of records proves to be the remains of his private music collection. The nearly 100 records, now worn and scratched, were stored in the attic of a former Soviet intelligence agent, who left a note saying he took them from the Reich Chancellery after the fall of Berlin in 1945.
—New York Times
Quoted in “Tyrants' Top 10, With a Bullet”
John Kenney, Los Angeles Times, August 16, 2007