hjässan
Hjässan is a term used in Sweden, primarily in older contexts or specific dialectal regions, to refer to the crown of the head, the top part of the skull. It's a descriptive term for that uppermost section of the head. The word's etymology is thought to be related to the Old Norse word "háss," meaning "high."
While not a commonly used term in everyday modern Swedish conversation, "hjässan" might still be encountered