What is stone deaf? How to use in English

The term "stone deaf" is an old-fashioned term that was used to describe the state of profound deafness, where a person can't hear any sounds at all. The origin of this phrase can be traced back to the 16th century English language, where it was believed that people who were deaf were insensitive to sounds, just as a statue made of stone is insensitive and motionless. The phrase "stone deaf" became a popular way of describing complete deafness, as it provided a tangible, understandable image of what it meant to not be able to hear anything at all. While the phrase is no longer common in everyday language, it still serves as an interesting historical artifact that helps us understand the ways in which deafness has been perceived throughout history.