Learn Swedish: Gästen frossar sig proppmätt på buffén. - The guest gorges himself stuffed at the buffet.

This is a resultative reflexive construction, which is the focus of this lesson. The verb frossar (gorges) is followed by the reflexive pronoun sig (himself) and the adjective proppmätt (stuffed). The adjective describes the result of the action: the guest eats until he becomes stuffed. Swedish uses this structure to cleanly pack an action and its outcome into a single phrase.

What does the prefix propp- add to the word mätt?

The word mätt simply means full or satisfied after eating. The prefix propp- comes from the noun en propp (a plug or cork). When added to an adjective like mätt, it acts as a strong intensifier, meaning you are so full you are plugged up or stuffed to the brim. Swedish often uses noun prefixes to create highly descriptive adjectives.

Could I use the verb frossar without the reflexive pronoun sig?

Yes, but the grammatical structure changes. If you just want to say what someone is overindulging in, you use the preposition i, like Gästen frossar i mat (The guest gorges on food). You need the reflexive sig in this sentence precisely because you are adding the resultative adjective proppmätt to describe the final state the guest achieves.

Why do we use the preposition på in på buffén?