This is the 1717th most frequent Catalan word.
dins
The Catalan word "dins" means "inside" in English.
Here, 'dins' is used to denote the interior location of the object (the box) where something (the surprise) is contained.
Dins la caixa hi ha una sorpresa.
Inside the box, there is a surprise.
In this sentence, 'dins' specifies entering into the space (the house) and is part of the phrase 'dins de' to articulate the meaning of going into.
Vam refugiar-nos dins de casa per la pluja.
We took shelter inside the house because of the rain.
In this usage, 'dins' reflects an internal or figurative sense, denoting a personal, emotional, or psychological inner space.