This is the 204th most frequent Icelandic word.
liggur
"Liggur" means "lies" or "is located."
Here, 'liggur' describes the position or state of the book being located on the table.
Bókin liggur á borðinu.
The book lies on the table.
In this sentence, 'liggja' figuratively indicates the act of being in the state of sleep.
Hinir liggja í svefni.
The others lie in sleep.
Here, 'liggur' denotes the geographic location of the town in proximity to the shore.