This is the 367th most frequent Icelandic word.
sumarið
"Sumarið" means "the summer" in English.
The word 'sumarið' here refers to last summer experienced, used as a definite noun in its neuter form.
Sumarið var mjög heitt í fyrra.
The summer was very hot last year.
'Sumarið' refers to the season of summer in a general and definite way, illustrating a recurring event.
Ég elska að fara á ströndina um sumarið.
I love to go to the beach during the summer.
In this example, 'sumarið' represents a specific summer during which an activity was carried out, emphasizing its identification with definite context.