belie

 
Pronunciation: /bɪˈlʌɪ/

verb (belies, belying, belied)

[with object]
  • 1(of an appearance) fail to give a true impression of (something): his lively, alert manner belied his years
  • 2fail to fulfil or justify (a claim or expectation): the quality of the music seems to belie the criticism

Origin:

Old English belēogan 'deceive by lying', from be- 'about' + lēogan 'to lie'. Current senses date from the 17th century