feign
This word carries a strong connotation of intentional deception and calculation. It is typically used in formal or literary contexts to describe a strategic performance of an emotion or condition, often to gain an advantage or avoid an unpleasant obligation. Unlike "pretend," which can be used for innocent play or imagination (such as a child pretending to be a superhero), "feign" almost always implies a conscious effort to mislead others about one's true internal state or physical health.
Meanings
To pretend to be affected by a feeling, state, or injury in order to deceive others.
"He decided to feign illness to avoid going to the meeting."
To create a false appearance of a particular quality or emotion.
"She tried to feign surprise when they presented her with the gift."