This is the 3rd most frequent Lithuanian word.
yra
"is"
In this sentence, 'yra' is used to denote the existence or location of the subject ('knyga') in a specific place ('ant stalo').
Knyga yra ant stalo.
The book is on the table.
Here, 'yra' functions to link the subject ('filmas') with its description ('labai įdomus').
Šis filmas yra labai įdomus.
This movie is very interesting.
In this sentence, 'yra' serves as a copula that connects the subject ('Pirmadienis') to an attribute ('pirmoji savaitės diena').