This is the 8734th most frequent Swedish word.
burit
"Burit" is the past participle of "bära," meaning "carried" or "borne."
In this sentence, 'burit' is the past participle form of the verb 'bära', which means 'to carry'. It is used here in conjunction with the present perfect auxiliary verb 'har' to indicate an action completed in the past, specifically her action of carrying the backpack all day.
Hon har burit ryggsäcken hela dagen.
She has carried the backpack all day.
Here, 'burit' is still the past participle of 'bära', but it is used metaphorically to mean 'to wear', connecting to the idea of 'carrying' clothing as part of tradition. It conveys the completion of their action of wearing costumes as a tradition.
De har alltid burit traditionella dräkter på festivalen.
They have always worn traditional costumes at the festival.
In this usage, 'burit' is part of the past perfect tense, combining with 'hade' to describe an action (carrying a stone) that was completed prior to another past event (the telling).