The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for buffer is "protective barrier.", the definition for prudent is "Marked by wisdom, shrewd.", and the definition for insolence is "Boldness or rudeness."

The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for periodic is "occurring at regular intervals.", the definition for pathos is "Sympathetic pity.", and the definition for disdain is "Feeling of contempt."

The definition for appalling is "Inspiring dismay or disgust." Used in a sentence: Hector found his roommate's habit of leaving his dirty socks on the floor appalling. The definition for elate is "to fill with joy.", the definition for extant is "Currently existing.", and the definition for drub is "To defeat decisively."

The definition for archetypal is "Characteristic of the original model or perfect example." Used in a sentence: Shakespeare's sonnets are considered archetypal love poems The definition for retroactive is "effective as of a prior time or condition.", the definition for interminable is "Never ending, or seemingly endless.", and the definition for untenable is "Not able to be defended."

The definition for pallid is "Lacking color." Used in a sentence: The nurse was worried by the patient's pallid face and shallow breathing. The definition for catastrophic is "relating to extreme misfortune.", the definition for trove is "Valuable collection.", and the definition for naive is "Lacking worldy wisdom."