This is the 614th most frequent Icelandic word.
dags
The Icelandic word "dags" means "day's" or "of the day."
In this sentence, 'dagsins' is the genitive singular form of 'dagur', meaning 'of the day', indicating possession.
Ég sakna dagsins sem við eyddum á ströndinni.
I miss the day we spent at the beach.
Here, 'dagsins' again appears in the genitive singular form and describes 'weather', connecting it to a specific day.
Veðrið dagsins var einstaklega fallegt.
The day's weather was exceptionally beautiful.
In this sentence, 'dags' appears in a fixed phrase 'frá degi dags', showing its use in a compound expression symbolizing 'from the start of the day'.