Yawned

Yawned is the past tense and past participle of the verb "yawn," which refers to the action of opening the mouth widely and breathing in deeply, often involuntarily, as a sign of tiredness, boredom, or sleepiness. The term can also be used as an adjective to describe something that has been yawned at, such as a yawned-at audience. The verb "yawn" originates from the Old English word "gāwan," which means "to open the mouth." The action of yawning is believed to be a reflexive response to the buildup of carbon dioxide in the bloodstream, as the body attempts to expel the excess gas. Yawning is a common behavior observed in many mammals, including humans, and can occur in both conscious and unconscious states. In some cultures, yawning is considered a sign of politeness or respect, and may be used as a greeting or to acknowledge someone's words. However, the exact purpose and significance of yawning remains a topic of ongoing scientific research.