The word "swollening" is an incorrect spelling of the word "swelling," which refers to an abnormal enlargement of a body part due to injury or disease. The correct pronunciation of "swelling" is /ˈswɛl.ɪŋ/, with the stress on the first syllable. The incorrect spelling may have been formed due to confusion with other words such as "swollen" or "swollenness." It's important to pay attention to the spelling of words in order to effectively communicate your message.