* "I send them a huge..."
To understand the full meaning, you need the word that follows "inmenso." For example:
* "Les mando un inmenso abrazo": I send them a huge hug.
* "Les mando un inmenso saludo": I send them a huge greeting.
* "Les mando un inmenso cariño": I send them a huge amount of affection.
Let me know if you have the full sentence, and I can give you a more precise translation.