Feign (verb)

1. To pretend to be affected by (a feeling, illness, etc.).
2. To make a false show of.
3. To make a pretense of.
4. To make-believe, pretend.

Origin:

Middle english feignen, from old french feindre, from latin fingere to shape, form, feign.

Examples:

1. She feigned sleep when he walked in the room.
2. He feigned interest in the conversation.
3. She feigned illness to get out of work.
4. He feigned ignorance of the situation.
5. She feigned surprise when she saw him.