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 brandish is "to shake or wave menacingly.", the definition for incidental is "Minor.", and the definition for regale is "To amuse."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for aerate is "to supply with air.", the definition for defiant is "Showing bold resistance.", and the definition for ethical is "Conforming to accepted standards."

The definition for cunning is "Showing clever insight." Used in a sentence: The general devised a cunning strategy to outfox the enemy. The definition for manifest is "obvious.", the definition for demeanor is "Behavior towards others.", and the definition for interminable is "Never ending, or seemingly endless."

The definition for corroborate is "To support with evidence." Used in a sentence: "Unless you can corroborate your story, it will not be admissible in court," the attorney told his client. The definition for pathos is "sympathetic pity.", the definition for combustion is "Act of burning.", and the definition for polarize is "To break up into opposing groups."

The definition for manifest is "Obvious." Used in a sentence: James finally made his affection manifest when he handed Jessica a red rose. The definition for dubious is "questionable.", the definition for belated is "Past the normal or proper time.", and the definition for finite is "Having definite limits."