The definition for rehash is "To discuss again." Used in a sentence: "Sandra," said her mother, "I am tired of rehashing this same topic over and over." The definition for futile is "without purpose, completely ineffective.", the definition for prudent is "Marked by wisdom, shrewd.", and the definition for incidental is "Minor."

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 cunning is "showing clever insight.", the definition for intricate is "Having complex and interrelated parts.", and the definition for rancorous is "Marked by deep ill–will."

The definition for derivative is "Lacking originality." Used in a sentence: Critics panned the movie as a derivative version of last year's Best Picture. The definition for ramble is "to wander, physically or in language.", the definition for solace is "Source of consolation.", and the definition for catastrophic is "Relating to extreme misfortune."

The definition for authoritarian is "Favoring absolute obedience to authority." Used in a sentence: Marco's authoritarian mother never allowed him to watch more than one hour of television a day. The definition for adversary is "one who opposes or resists.", the definition for deferment is "The act of delaying.", and the definition for hedonism is "Belief that pleasure is the sole aim of life."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for corrosive is "bitingly sarcastic.", the definition for abate is "Become less in amount or intensity.", and the definition for composed is "Calm."