W domu nie marzniemy, bo używamy dużego koca.

At home we are not freezing, because we use a big blanket.

Breakdown of W domu nie marzniemy, bo używamy dużego koca.

• dom: the house
• duży: big
• w: in
• nie: not

Questions & Answers about W domu nie marzniemy, bo używamy dużego koca.

Why is it w domu instead of w dom or w domie?

Because Polish prepositions control specific cases, and w with a static location (being in/at somewhere, not movement into somewhere) takes the locative case.

• The noun dom (house/home) in the locative singular is domu.
• So the pattern is:
  
  • w + locative → w domu = in/at home
• *w dom is wrong because dom is nominative/accusative, not locative.
• w domie would be possible only if the noun’s locative were domie, but for dom the standard form is domu, not domie.

So w domu is simply “in/at the house / at home” in correct locative case.

Does w domu mean “at home” or “in the house”? Is there a difference?

w domu can mean both, and context decides which English translation feels more natural.

• at home (general, where you live):
  
  • W domu nie marzniemy = We don’t feel cold at home.
• in the house (contrasting inside vs outside):
  
  • Na dworze jest zimno, ale w domu nie marzniemy
    Outside it’s cold, but in the house we don’t feel cold.

Polish usually doesn’t force this distinction; w domu covers both ideas.