The idiomatic phrase "set the teeth on edge" is used to describe the sensation of an unpleasant or disturbing feeling, typically an irritating sound or taste, that causes discomfort or annoyance. This expression originates from the literal feeling that is experienced when the teeth scrape against a hard surface, creating an uncomfortable grinding sensation.
Figuratively, it is commonly used to convey the notion of something that elicits a strong negative reaction or produces a deep sense of irritation. It implies a feeling of unease or intense displeasure brought about by an action, circumstance, or event that strikes a nerve or rubs someone the wrong way. The phrase is typically applied in situations where an external stimulus, such as a sound, taste, or behavior, evokes a visceral response that invokes discomfort, revulsion, or general uneasiness.
For instance, the shrill sound of nails scratching a chalkboard can be said to "set the teeth on edge" due to the grating nature that sends shivers down one's spine. Similarly, a bitter taste, like that of biting into an unripe fruit, can "set the teeth on edge" by producing an off-putting sensory experience.
Overall, "set the teeth on edge" captures the idea of an unsettling or irksome encounter that triggers a reaction akin to the discomfort felt when teeth scrape against a hard surface, conveying a strong sense of unpleasantness or annoyance.
