The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for revive is "to bring back to life.", the definition for aesthete is "Person having or affecting sensitivity to beauty.", and the definition for sociable is "Inclined to seek companionship."

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 periodic is "occurring at regular intervals.", the definition for retroactive is "effective as of a prior time or condition.", and the definition for incidental is "Minor."

The definition for serenity is "Calmness." Used in a sentence: The serenity of the glassy sea soothed the sailors after the big storm. The definition for dubious is "questionable.", the definition for augment is "To make greater.", and the definition for colossal is "Immense, enormous."

The definition for hedonism is "Belief that pleasure is the sole aim of life." Used in a sentence: The hedonism of the emperoro, who spent all his time giving parties, caused his downfall. The definition for proximity is "closeness.", the definition for straddle is "To favor opposing sides.", and the definition for prune is "To reduce by removing excess."

The definition for placebo is "An inactive substance used in medical testing." Used in a sentence: Tom, who had taken the placebo, found that his allergy symptoms did not go away. The definition for surplus is "excess.", the definition for equitable is "Fair and equal.", and the definition for refurbish is "To brighten or freshen."