Dissemble (verb)

1. To conceal one's true motives, feelings, or beliefs; to pretend.
2. To give a false appearance; to mislead.

Origin:

From the latin word "dissemblere" which means "to disguise or hide".

Examples:

1. He dissembled his anger with a smile.
2. She dissembled her true feelings about the situation.
3. The politician dissembled the truth during the interview.
4. He dissembled his identity to gain access to the building.
5. She dissembled her knowledge of the subject in order to avoid answering the question.