This is the 573rd most frequent Icelandic word.
hópi
"Hópi" is the dative singular of "hópur," meaning "group" or "crowd" in Icelandic.
Here, 'hópi' is in the dative case, indicating that the action of going together happens within the context of a group functioning as a single unit.
Við fórum í hópi á tónleikana.
We went to the concert in a group.
In this sentence, 'hópi' is again in the dative case, as it assigns the location/context of the interaction.
Ég talaði við hann í hópi.
I spoke to him in a group.
In this usage, 'hópi' indicates the setting where the decision-making process occurred, demonstrating the instrumental role of collective discussion.