Original: Chili pepper (from Nahuatl chilli, chilli pepper, chilli, chillie, chili, and chile) is the fruit of plants from the genus Capsicum, members of the nightshade family, Solanaceae.
Simplified: Chile pepper (also spelled Chili pepper, Chilli pepper; often shortened to chile) is the fruit of a series of plants called Capsicum (nightshade family).