This is the 11274th most frequent Spanish word.
envían
"They send."
In this sentence, 'envían' is used to indicate the habitual action of sending letters in a present tense situation.
Ellos envían cartas a sus amigos regularmente.
They send letters to their friends regularly.
Here, 'envían' is used as a command in the present tense in familiar plural form.
Por favor, envían las fotos cuando tengas tiempo.
Please send the photos when you have time.
'Envían' is employed in a complex sentence to show contrast, illustrating repeated action in the present.