This is the 2753rd most frequent Spanish word.
llaves
Keys.
The word 'llaves' here is used literally to refer to keys needed to unlock something, typically a physical lock.
Necesito las llaves para abrir la puerta.
I need the keys to open the door.
In this context, 'llaves' refers to tools, specifically wrenches, used in plumbing and mechanical work.
El fontanero busca las llaves adecuadas para reparar la tubería.
The plumber looks for the right wrenches to repair the pipe.
Here, 'llaves' is used metaphorically to signify essential aspects or tools needed to achieve something abstract, such as success.