betraying
verb (present participle)UK /bɪˈtreɪ.ɪŋ/
US /bɪˈtreɪ.ɪŋ/
Hurting someone who trusts you by doing something that is not loyal.
He felt sad because his friend was betraying him by sharing his secret.
OTHER MEANINGS
2. Showing feelings or secrets that you were trying to hide.
Her shaking hands were betraying how nervous she really was.
3. Giving away a country or group to an enemy.
The soldier was accused of betraying his country.
4. Showing something without meaning to.
His smile was betraying his excitement about the surprise.