This is the 5677th most frequent Swedish word.
gömmer
"Hides" or "is hiding."
Here, 'gömmer sig' employs a reflexive form, indicating an action being performed by the subject upon itself: hiding.
Katten gömmer sig under soffan.
The cat hides under the sofa.
In this case, 'gömmer' is used in its transitive form, where the subject (He) performs the action on an object (the key): hiding.
Han gömmer nyckeln i en bok.
He hides the key in a book.
Here, 'gömmer' is presented in its simple present tense, illustrating a general action of hiding in a hypothetical situation.