This is the 317th most frequent Icelandic word.
staðfest
Confirmed.
The word 'staðfest' is used here to mean 'confirmed,' indicating an action of verifying or affirming the mentioned reservation.
Ég hef staðfest bókunina fyrir ferðina.
I have confirmed the booking for the trip.
Here, 'staðfestum' is the conjugated verb form meaning 'we confirmed,' demonstrating its use as an active verb.
Við staðfestum upplýsingar þeirra með tölvupósti.
We confirmed their information via email.
In this sentence, 'staðfest' acts as an adjective or past participle meaning 'confirmed,' describing the established understanding.