This is the 10939th most frequent Swedish word.
lyckosamt
Fortunate or successful.
The word 'lyckosamt' here modifies 'beslut', indicating that the decision brought good fortune or success.
Det var ett lyckosamt beslut att flytta till staden.
It was a fortunate decision to move to the city.
In this sentence, 'lyckosamt' describes the manner in which she found the book, implying it was by good chance.
Hon fann lyckosamt en gammal bok hon länge letat efter.
She fortunately found an old book she had been searching for.
Here, 'lyckosamt' is used to describe the outcome of the trip, signifying it was smooth and positive.