This is the 248th most frequent Icelandic word.
telur
"Telur" means "counts" or "considers" in English, depending on context.
In this sentence, 'telur' functions as a verb meaning 'believes' to express an opinion or thought.
Hann telur að verkefnið takist.
He believes that the project will succeed.
Here, 'telur' is used as a verb meaning 'counts' in the context of enumeration or counting objects.
Hún telur peningana sína vandlega.
She counts her money carefully.
In this case, 'telur' refers to counting individuals present in a specific location, such as students in a classroom.