This is the 7389th most frequent Spanish word.
hidráulica
The branch of science and engineering concerned with the properties and movement of liquids.
The word 'hidráulica' here is used as an adjective to describe a type of energy derived from water movement.
La energía hidráulica es una fuente renovable importante.
Hydraulic energy is an important renewable source.
In this sentence, 'hidráulico' is an adjective to describe the system powered by liquid flow under pressure.
El sistema hidráulico del coche necesita mantenimiento.
The car's hydraulic system needs maintenance.
The word 'hidráulica' is used as a noun referring to the branch of science and technology concerned with the mechanics of liquids.