An incubator is a device used to keep eggs warm and provide the necessary environment for them to hatch. The term INCUBATOR can be broken down into three parts: HEN (3 letters), WOMB (4 letters), and BROODER (7 letters). A HEN is a female bird, and its WOMB is where it lays its eggs. A BROODER is a device that provides warmth and humidity to the eggs, allowing them to hatch. Together, these three terms form the word INCUBATOR, which is a device used to keep eggs warm and provide the necessary environment for them to hatch.