Originally Answered
The word entertaiment is derived from the Latin inter tenere, meaning to hold inside. It also contains the Indo-European root ten, which means to stretch.
In other words, entertainment is an activity that holds the attention and interest of an audience or gives pleasure and delight. This can include movies and television, music (listening or playing musical instruments), reading novels and short stories, poetry, and sports and games. It can also involve visiting art galleries or museums and appreciating or creating visual art. The word entertaiment can be used in many ways, and some are more common than others.