The definition for punctual is "On time." Used in a sentence: Ron was worried when the usually punctual Amanda was late for the show. The definition for fragile is "delicate.", the definition for fidelity is "State of being faithful.", and the definition for serenity is "Calmness."

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 gravity is "importance, significance.", the definition for heinous is "Shockingly evil.", and the definition for preclude is "To rule out in advance."

The definition for demean is "To lower status." Used in a sentence: The embarrassing photograph demeaned the candidate in the eyes of the voters. The definition for servile is "fearfully submissive.", the definition for perception is "Capacity for seeing or understanding.", and the definition for induce is "To influence or cause."

The definition for defiant is "Showing bold resistance." Used in a sentence: The defiant toddler refused to leave the park. The definition for periodic is "occurring at regular intervals.", the definition for negate is "To make invalid.", and the definition for cunning is "Showing clever insight."

The definition for grandiose is "With an affectation of grandeur." Used in a sentence: The sweeping, grandiose staircase looked preposterous in the modest entry hall. The definition for retroactive is "effective as of a prior time or condition.", the definition for naive is "Lacking worldy wisdom.", and the definition for opportune is "Suitable or convenient."