This is the 987th most frequent Danish word.
besluttede
"Besluttede" means "decided" in English.
In this sentence, 'besluttede' is the past tense form of the verb 'beslutte', meaning 'decided'. It conveys that the decision to go on vacation was made in the past.
Han besluttede at tage på ferie i Spanien.
He decided to go on vacation to Spain.
Here, 'besluttede' is complemented with 'os for', a reflexive construction indicating the decision was mutual or personal. It shows the past action of making the decision.
Vi besluttede os for at købe et nyt hus.
We decided to buy a new house.
In this case, 'besluttede' is again used in its past tense form. The reflexive pronoun 'sig' highlights the personal nature of her decision.