A kitchenette is a very small, scaled-down area for doing basic cooking and food preparation. If your fancy hotel suite has a kitchenette, you can make popcorn in the microwave.
The suffix -ette is used as a diminutive, to mean "a small version," and that's just what a kitchenette is — a kitchen, but smaller. Sometimes a kitchenette is distinguished by its pint-sized appliances, like miniature refrigerators and narrow stovetops. It might also be missing certain standard elements of a kitchen, like a sink or a dishwasher. If you're staying in a hotel or living in a college dorm, a kitchenette can be all the kitchen you need.