This is the 715th most frequent Icelandic word.
tuttugu
The Icelandic word "tuttugu" means "twenty" in English.
Here, 'tuttugu' specifies the age of the person in years.
Hann er tuttugu ára gamall.
He is twenty years old.
In this context, 'tuttugu' quantifies the number of apples possessed.
Ég hef tuttugu epli.
I have twenty apples.
'Tuttugu' here represents the hour of the day according to the 24-hour clock.