This is the 424th most frequent Icelandic word.
ljúka
"End" or "complete."
In this sentence, 'ljúka' is used to indicate completing a specific task or project.
Ég ætla að ljúka verkefninu fyrir helgi.
I am going to finish the project before the weekend.
Here, 'ljúka' conveys the action of completing the reading of a book.
Við getum lokið við bókina í kvöld.
We can finish reading the book tonight.
In this context, 'ljúka' refers to the act of bringing an enjoyable day to an end.