This is the 18308th most frequent Russian word.
шлет
"Sends."
The word 'шлет' is used in the context of sending something, specifically a letter in this case.
Он шлет письмо своей маме.
He is sending a letter to his mother.
In this sentence, 'шлет' implies the repeated action of sending greetings on a regular basis.
Каждую неделю она шлет поздравления друзьям.
Every week, she sends greetings to her friends.
Here, 'шлет' embodies the act of symbolically sending something, such as air kisses.