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 ) .