This is the 9410th most frequent Spanish word.
alargan
"Alargan" means "they lengthen" or "they extend" in English.
Here, 'alargan' conveys the idea of becoming longer, describing a natural phenomenon.
Las sombras de los árboles se alargan al atardecer.
The shadows of the trees lengthen at sunset.
In this sentence, 'alargan' is used to mean to extend a duration of time.
Los maestros alargan el plazo para entregar el proyecto.
The teachers extended the deadline to submit the project.
This usage of 'alargan' involves physically making an object longer.