estalido

Estalido is a term originating from Portuguese that refers to a cracking or snapping sound. It is often used to describe the noise made by a joint when it is moved, such as when cracking one's knuckles. The sound is generally believed to be caused by the formation and collapse of bubbles within the synovial fluid that lubricates the joints. While often associated with a sensation of relief, the scientific consensus is that estalido itself does not cause harm to the joints.

The term can also be applied to other sharp, sudden sounds. For instance, it might describe the noise of a twig breaking underfoot or the pop of a cork being removed from a bottle. In some contexts, estalido can carry a more figurative meaning, implying a sudden outburst or a sharp, unexpected event. However, its most common and literal usage pertains to the auditory sensation of a quick, percussive sound, particularly from bodily joints. The physical mechanism behind the estalido of joints remains a subject of scientific interest, with theories focusing on gas bubble dynamics within the synovial fluid.