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 derivative is "lacking originality.", the definition for elusive is "Hard to grasp.", and the definition for refurbish is "To brighten or freshen."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for elusive is "hard to grasp.", the definition for turmoil is "Extreme confusion, agitation.", and the definition for corroborate is "To support with evidence."

The definition for aesthete is "Person having or affecting sensitivity to beauty." Used in a sentence: Consuela's friends called her an aesthete when she claimed that Monet's paintings made her cry. The definition for nurture is "to further the development of.", the definition for insolence is "Boldness or rudeness.", and the definition for stealth is "The act of moving secretly or unnoticed."

The definition for buffer is "Protective barrier." Used in a sentence: The dense trees acted as a buffer against the heavy rain. The definition for fickle is "lacking constancy, changeable.", the definition for servile is "Fearfully submissive.", and the definition for prudent is "Marked by wisdom, shrewd."

The definition for melodious is "Having a pleasing melody." Used in a sentence: The melodious sounds of the symphony soothed Tim after his trying day. The definition for deferment is "the act of delaying.", the definition for pretentious is "Making unjustified claims.", and the definition for exalt is "To elevate by praise."