To maintain a false belief or misinformation about one's life.

एक झूठ में जीना

English Usage: Despite his cheerful demeanor, he continued to live a lie about his true feelings.

Hindi Usage: अपने खुशी भरे चेहरे के बावजूद, वह अपनी सच्ची भावनाओं के बारे में झूठा जीवन जीता रहा।