This is the 4955th most frequent Spanish word.
echan
"Echan" means "they throw" or "they put out."
Here 'echan' is used to describe the action of pouring or throwing something, specifically water in this case.
Ellos echan agua en las plantas para mantenerlas saludables.
They pour water on the plants to keep them healthy.
In this sentence, 'echan' is used as part of the phrase 'echar un vistazo', which means 'to glance at or look at quickly'.
Siempre echan un vistazo a las vitrinas del centro comercial.
They always take a glance at the shop windows in the mall.
Here 'echan' signifies the action of sending or depositing something, which is 'the work' in the mailbox.