give a false impression
belie - contradict
‘Belie’ expresses characteristics or behaviour that hide the truth. As such, a good way to remember how to use ‘belie’ is to think of it as ‘be lying’. However, it's important to note that the truth in question can be hidden inadvertently as well as deliberately with this word.
You would never guess that Paul is 50. His appearance certainly does belie his age.
The salesperson seemed polite and trustworthy, but his pleasant manner belied his true character.
There is a lot of pressure on Sandra to complete the task on schedule. Her calm face belies the anxiety she must be feeling.