The word "knulling" is a slang term that refers to sexual intercourse. The spelling of this word follows the standard pronunciation rules of the Norwegian language. The IPA phonetic transcription of this word would be /ˈknʉlɪŋ/. The "k" is pronounced as a hard "k" sound, and the double "ll" represents a prolonged "l" sound. The "u" is pronounced as a short "u" sound, and the final "ing" is pronounced as "ɪŋ". While the word may be considered offensive to some, it is important to understand the appropriate spelling and pronunciation.