Learn Swedish: Äventyraren verkar trött och går till sängs. - The adventurer seems tired and goes to bed.

In older Swedish, the preposition till forced the following noun into the genitive case, which adds an 's'. This grammar rule is dead today, but it survives in set phrases like till sängs (to bed). You will see this same fossilized 's' in expressions like till havs (to sea) or till skogs (to the woods).

What is the difference between gå till sängs and gå till sängen?

Gå till sängs is a fixed expression that specifically means 'go to bed' to sleep. If you say går till sängen, you are talking about the literal, physical movement toward the specific bed, maybe just to grab a book you left on the pillow.

Since äventyraren is in the definite form (the adventurer), why isn't trött in the definite form trötta?

Adjectives only take the definite 'a' ending when they are placed directly before the noun. Here, trött comes after the verb verkar. In this position, the adjective only matches the noun's gender and number. Since äventyraren is a singular en-word, it takes the basic form trött.

How do I make a word like äventyraren plural?