Definition of crystal clear

The origin of the phrase "crystal clear" can be traced back to the early 1800s, where it was used to describe pure and transparent substances, especially crystals. The word 'crystal' itself has its roots in the Greek word 'krystallos', meaning ice or clear ice. In the 18th century, the discovery of quartz crystal, with its perfect cleanness and transparency, further deepened the association between crystals and clarity. As a result, the term 'crystal clear' began to be used to describe any substance that is free from impurities and has a perfectly clear appearance, much like a crystal. Over time, the phrase has come to represent any idea, event, or communication that is easily understood and free from obscurity or ambiguity. It is a popular metaphor used to describe clear and understandable speech, actions, or ideas, further strengthening the connection between crystal clarity and positive human qualities. In summary, 'crystal clear' can be traced back to the 1800s when it was used to describe translucent substances, and its popularity as a metaphor has since increased, representing clarity and understandability in human communication.